Terminal valuations, growth rates and the implied cost of capital
Authors
- First online:
DOI: 10.1007/s11142-012-9208-5
Abstract
We develop a model based on the notion that prices lead earnings, allowing for a simultaneous estimation of the implied growth rate and the cost of equity capital for US industrial sectors. The major difference between our approach and that in prior literature is that ours avoids the necessity to make assumptions about terminal values and consequently about future growth rates. In fact, growth rates are an endogenous variable, which is estimated simultaneously with the implied cost of equity capital. Since we require only 1-year-ahead forecasts of earnings and no assumptions about dividend payouts, our methodology allows us to estimate ex ante aggregate growth and risk premia over a larger sample of firms than has previously been possible. Our estimate of the risk premium being between 3.1 and 3.9 % is at the lower end of recent estimates, reflecting the inclusion of these short-lived companies. Our estimate of the long run growth is from 4.2 to 4.7 %.
Keywords
Cost of capital Risk premium Growth rate Earnings forecastsJEL Classification
G12 G14 G17 G31 M411 Introduction
The concept of the expected return to equity is a core idea in financial economics. However, due to its directly unobservable nature, proxies are normally used by both academics and practitioners. The two most common proxies are some statistic based on past realized returns or an estimate based on the implied cost of equity capital deduced from analysts’ forecasts. Although returns over the long run provide an estimate of expected returns, “realized returns are a very poor measure of expected returns” (Elton 1999). The expected return varies over time “because a high realized return often signals that the expected return is falling rather than that the expected return is high” (Pastor et al. 2008). While one appealing feature of the implied cost of equity capital as a proxy for expected returns is that it does not rely on the noisy history of realized asset returns, the infinite series of expected future flows from an asset is invariably truncated using a terminal valuation. Hence the precision of this implied cost of capital estimate is potentially very dependent on the assumed rate of growth in perpetuity of the future flows inherent in the construction of this terminal valuation. Analysts’ forecasts of earnings and the emergent price consequent on those forecasts not only imply a discount rate for earnings, a cost of capital, but also implicit assumptions about the future growth rate in those earnings. In contrast this future growth rate is the subject of various ad hoc assumptions in the existing literature.
Apart from differences in the assumed post-horizon behavior of earnings or residual income, the methods used to estimate the implied cost of capital differ, inter alia, in respect of the assumptions made about the structure of the equity valuation model and about the dividend policy pursued. For instance, Gordon and Gordon (1997) impose the assumption that a firm’s return on equity (ROE) converges to its cost of equity capital beyond a 4-year forecast horizon. Gebhardt et al. (2001) and Liu et al. (2002) assume that from year 4 to year 12 the firm’s return on investment converges to the industry median in a linear fashion and then remains constant in perpetuity. In addition, firms are assumed to have a 100 % dividend payout ratio beyond the forecast horizon.^{1} Claus and Thomas (2001) assume residual earnings grow at the expected inflation rate after a 5-year forecast horizon and assume that 50 % of earnings are retained each period. Botosan and Plumlee (2002) avoid explicit forecasts of future growth rates by using a Value Line forecast as the year-5 terminal value. Implicitly they are assuming that analysts’ forecasts and the market’s forecasts of terminal value are consistent. Gode and Mohanram (2003) applying the Ohlson and Juettner-Nauroth (2005) model assume that a firm’s growth in residual income reverts to an economy-wide level, which they equate to the risk free rate less 3 % beyond the forecast horizon. They also assume a different short-term growth in earnings equal to the average of the forecast 2-year growth and 5-year growth.
In view of the many approaches adopted, it is perhaps not surprising that the estimated equity-risk premium, the difference between the expected equity return and a risk-free rate, has ranged from a negative number to more than 12 %. While the estimates summarizing data from 1926 provided by Ibbotson Associates may be the most widely used proxy for the equity premium derived from historical returns, this proxy seems to be much higher than most recent findings based on estimates of the implied cost of equity capital.^{2} For example, comparing and contrasting five different approaches to generating estimates of the implied cost of equity capital, Botosan and Plumlee (2005) find that the risk premium varies from a low of 1 % to a high of 6.6 %, while the average realized premium during their sample period is 12.5 %. While Easton et al. (2002) and Gode and Mohanram (2003) find the equity risk premium to be between 5 and 6 %, others believe that equity risk premium is between 2 and 4 % (for example, Bogle 1999; Claus and Thomas 2001; Gebhardt et al. 2001; Pastor et al. 2008).^{3} Some researchers even suggest that the premium is close to zero (for example, Mehra and Prescott 1985; Glassman and Hassett 1998; Easton and Sommers 2007). Welch (2000) finds that the declining dividend yields have caused predicted equity premium to turn negative.^{4} In contrast to the approach adopted in this paper, few studies have developed broad based estimates of the variation in the growth rate and the cost of equity capital and hence the risk premium on a year by year basis over a 30-year period.
Almost all studies of the implied cost of capital take the growth rate in the terminal valuation as an exogenous parameter. The only prior attempts to estimate simultaneously the implied cost of capital and growth are to be found in the papers by Easton et al. (2002), Easton (2004), and Nekrasov and Ogneva (2011).^{5} The approach proposed in this paper, however, differs from Easton et al. (2002) and Easton (2004) in a number of important aspects. First, the interpretation of growth is different; second, we adopt a less restrictive model for the valuation of equity. We assume a simple conceptual valuation model in which prices can be expressed as a linear function of current accounting fundamentals plus an unspecified variable summarizing information not captured by this linear accounting function; third, we require only 1-year-ahead forecasts of earnings, which supposedly are more reliable than longer-term forecasts. In contrast to Easton et al. (2002), we do not need to assume that the implied growth rate and the growth rate in residual earnings are the same: the growth rate in our context can be interpreted as growth in the value of a firm’s stock rather than its residual earnings. We also do not require up to 4 years of earnings forecasts and thus avoid the need to treat the 4-year residual earnings as a perpetuity. The relaxation of these two restrictions effectively avoids the necessity of making explicit assumptions about the structure of the terminal valuation. Furthermore, we do not assume, as do Easton et al. (2002), that the expected dividends in the subsequent 4 years are equal to dividends paid at current fiscal year end (year 0). In a later paper, Easton (2004) also estimates a growth parameter, which he defines as “the perpetual rate of change in abnormal growth in earnings.” This growth clearly differs from the growth rate of a firm.^{6} It relies on Ohlson and Juettner-Nauroth (2005) model and naturally requires 2 years forecasts of earnings. Again, Easton (2004) assumes a specific dividend payout policy, that is, dividend in year one equals current fiscal year end dividend. In contrast, we develop a model that allows for a simultaneous estimate the growth rate and the cost of equity capital for US industrial sectors. We adopt the simpler assumption that dividends merely displace book values on a dollar for dollar basis and that dividend payout policy is irrelevant. Relaxing the dividend assumption has several benefits. First, it obviates bias induced by simple forecasts of future dividends, residual income, and abnormal growth in earnings. Second the fact that we do not need to make any assumptions about future dividend payouts allows us to include firms with negative forecasted earnings. These assumptions about dividend policy, together with the fact that we do not need earnings forecasts beyond the first year, enable us to estimate ex ante aggregate growth rates and the equity risk premia over a larger sample of firms than has previously been possible. However, the major difference between our approach and that in prior literature is that ours avoids the necessity to make assumptions about the detailed structure of valuation models or about terminal values and hence about future growth rates. This new approach is based on the notion that prices lead earnings and earnings have persistence. Specifically, we show how expected earnings relate to current equity prices and accounting fundamentals. To our knowledge, this is the first model to show this relationship in an analytic form. We also establish the relation between realized returns and the implied cost of capital and one-period-ahead forecasts of earnings. This enables us to discuss the impact of analysts’ optimism documented in prior literature on our estimates. Our model also establishes the relationship between the implied cost of equity capital and accounting risk factors, such as earnings-to-price, book-to-price, and dividend yield.
We start by assuming no arbitrage and clean surplus accounting. We then establish a link between equity valuation and analysts’ forecasts of 1-year-ahead earnings. Contemporaneous values of price, reported book values, earnings, dividends, and forecasts of the following year earnings form the primary inputs into our model. In the spirit of Easton et al. (2002), the implied cost of capital and growth rate can be inferred by regressing 1-year-ahead forecasts of earnings on prices and other financial statement variables. We use this forward-looking approach to estimate simultaneously the implied cost of capital and the growth rate on both a year-by-year and on an industry-by-industry basis.
Our analysis is based on two variants of our valuation model. One we label as a simple model, and the other we refer to as the extended model. This latter model explicitly incorporates an adjustment for accounting conservatism into the model. The rationale is that growth firms have increased demands for conservatism (Smith and Watts 1992), and growth in investment reduces reported earnings (Penman and Zhang 2002). Apart from estimates of growth, we find that our estimates of cost of capital and risk premia are relatively robust to either of the modeling approaches adopted or the way the data is grouped. Based on available US data over the period 1975–2006, our estimation of the implied cost of capital is in the lower end of the range relative to prior literature. The mean risk premium is between 3.1 and 3.9 %, depending on the precise model and data set used. We estimate the mean cost of capital to be between 10.8 and 11.2 % during our sample period.
On the other hand, the mean and median annual expected growth rates during our sample period are respectively 4.2 and 4.0 % on a year-by-year basis. This is much lower than the estimates produced by Easton et al. (2002), which are of the order of 10 %. We find closer agreement between our estimated growth rate and the forecasts produced by the Congressional Budget Office. We also find justification in the use by prior studies of the risk free rate minus 3 % as a proxy of long term growth in terminal valuations (Claus and Thomas 2001; Gode and Mohanram 2003). Our average growth forecast not only assumes the same average value of this latter rate but also shows similar fluctuations to this rate when viewed on a year-by-year basis.
The rest of the paper is organized as follows. Section 2 develops our theoretical models for the determination of the cost of equity capital and growth rates. Section 3 describes the sample in our analysis. Section 4 reports the empirical findings and compares our results with prior literature. Section 5 concludes.
2 Model development and empirical design
At this stage, note that the growth in the non-accounting variable ϑ_{ t } can be estimated although the variable itself remains a black box.^{9} The growth parameter lends itself to a relatively straightforward interpretation. Cointegration considerations of Eqs. (1) and (2) imply that the growth rate g can be interpreted as the long-run growth of the firm or growth rate in investment in Feltham and Ohlson (1996) framework.^{10} Another way of viewing the growth parameter is to suppose that other information could be reduced to a linear function of all future earnings. In this case, g must be interpreted as the nominal growth in perpetuity of these earnings. We might well expect g to equate on average to the long run nominal growth in GDP.^{11}
In both our models, (4) and (8), all the right-side variables are observable at time t, and we can use analysts’ earnings forecasts, that is one-period-ahead forecasted earnings to proxy E[e _{ t+1}]. We expect \( \delta_{1} (\delta_{1}^{\prime } ) > 0 \) on the assumption that prices lead earnings and expected earnings to have a positive persistence with \( \delta_{2} (\delta_{2}^{\prime } ) > 0 \). We also expect that the growth rate, g, estimated from Eq. (9) will be lower than the growth rate estimated using Eq. (5), if growth firms are more conservative and growth in investment reduces reported earnings (Smith and Watts 1992; Penman and Zhang 2002).
We note that Richardson et al. (2010) recently proposed a generalized one-period-ahead prediction model of earnings in terms of current period earnings, changes in book value, the lagged book value, and non-accounting information. They suggest that the set of non-accounting information includes information such as current market prices of equity and changes in current market prices. Specifically, they accept that earnings are highly persistent, and, consistent with prior findings, prices and returns on equity are leading indicators of future earnings. In addition, they suggest that changes in book values of equity may also reflect accounting conservatism and accounting accruals. Accordingly, lagged book values may play a critical role in predicting future earnings. Therefore the earning forecast model, (8), in effect is a formalization of the arguments of Richardson et al. (2010). It shows that one-period-ahead earnings can be written as a function of five variables: current earnings, current and lagged book values, and current and lagged equity prices.
3 Sample description
Our sample consists of prices and accounting data in the intersection of the Center for Research in Security Prices (CRSP) and Compustat over the period 1974–2006 and the Institutional Brokers Estimate System (I/B/E/S) between 1976 and 2007. The adjusted numbers of shares outstanding, adjusted price and adjusted dividends at the end of the fiscal year, and adjusted price of equity 3 months after the fiscal year-end are collected from CRSP. Relevant accounting data is collected from Compustat. Firms with negative book values (#60) are deleted. Earnings are measured as net income before extraordinary items (#18). We use median consensus forecasts of earnings per share at the first month after the corresponding I/B/E/S-reported prior-year earnings announcements. All variables used in our estimation are divided by the adjusted number of shares in issue to reduce heteroskedasticity and increase comparability across time.
Sample descriptive statistics
FEPS |
P |
BPS |
EPS |
DPS |
P/B |
EP |
ROE |
SIZE |
LEV | |
---|---|---|---|---|---|---|---|---|---|---|
Panel A: Sample statistics | ||||||||||
N |
55,481 |
107,459 |
107,459 |
107,459 |
107,459 |
107,459 |
107,459 |
107,459 |
107,459 |
107,459 |
Mean |
1.117 |
12.580 |
8.814 |
0.659 |
0.026 |
2.016 |
0.062 |
0.071 |
4.790 |
0.788 |
SD |
1.011 |
10.840 |
8.518 |
1.437 |
0.105 |
1.962 |
0.134 |
0.197 |
1.884 |
1.085 |
p25 |
0.430 |
4.500 |
3.071 |
0.084 |
0.000 |
0.931 |
0.015 |
0.023 |
3.345 |
0.122 |
Median |
0.900 |
9.375 |
6.414 |
0.551 |
0.000 |
1.453 |
0.069 |
0.108 |
4.684 |
0.394 |
p75 |
1.600 |
17.380 |
11.900 |
1.266 |
0.000 |
2.336 |
0.123 |
0.169 |
6.177 |
0.991 |
FEPS |
P |
EPS |
BPS |
DPS |
P/B |
ROE |
EP |
SIZE |
LEV | |
---|---|---|---|---|---|---|---|---|---|---|
Panel B: Correlation matrix (Pearson bottom; Spearman top) | ||||||||||
FEPS |
0.734 |
0.828 |
0.745 |
0.220 |
−0.075 |
0.363 |
0.425 |
0.361 |
0.184 | |
P |
0.672 |
0.630 |
0.697 |
0.153 |
0.291 |
0.188 |
0.069 |
0.601 |
−0.059 | |
EPS |
0.743 |
0.466 |
0.653 |
0.226 |
−0.081 |
0.594 |
0.672 |
0.339 |
0.130 | |
BPS |
0.692 |
0.613 |
0.520 |
0.186 |
−0.427 |
−0.047 |
0.214 |
0.280 |
0.328 | |
DPS |
0.236 |
0.188 |
0.185 |
0.208 |
−0.058 |
0.106 |
0.157 |
0.123 |
0.115 | |
P/B |
−0.141 |
0.173 |
−0.136 |
−0.310 |
−0.055 |
0.292 |
−0.213 |
0.373 |
−0.523 | |
ROE |
0.362 |
0.208 |
0.604 |
0.123 |
0.068 |
−0.128 |
0.697 |
0.225 |
−0.151 | |
EP |
0.382 |
0.104 |
0.660 |
0.207 |
0.077 |
−0.192 |
0.732 |
0.013 |
0.146 | |
SIZE |
0.336 |
0.595 |
0.303 |
0.276 |
0.116 |
0.181 |
0.250 |
0.107 |
−0.121 | |
LEV |
0.111 |
−0.112 |
0.001 |
0.176 |
0.051 |
−0.265 |
−0.063 |
0.010 |
−0.132 |
4 Empirical results
4.1 Implied cost of capital and rate of growth
4.1.1 Analysis on a year-by-year basis
The descriptive statistics for regressing forecasted earnings on price, earnings, book value, lagged book value, and lagged price, year by year
Mean |
SD |
Minimum |
Lower quartile |
Median |
Upper quartile |
Maximum | |
---|---|---|---|---|---|---|---|
Panel A: Simple model \( \frac{{feps_{t + 1} }}{{P_{t} }} = \delta_{1} + \delta_{2} \frac{{e_{t} }}{{P_{t} }} + \delta_{3} \frac{{b_{t} }}{{P_{t} }} + \delta_{4} \frac{{b_{t - 1} }}{{P_{t} }} + \varepsilon_{t + 1} \) | |||||||
N |
1,734 |
551 |
600 |
1,397 |
1,589 |
2,292 |
2,573 |
δ_{1} |
0.049 (11.97) |
0.014 (3.80) |
0.027 (4.56) |
0.039 (9.58) |
0.047 (12.28) |
0.058 (14.08) |
0.079 (19.05) |
δ_{2} |
0.295 (7.73) |
0.099 (2.32) |
0.156 (3.03) |
0.227 (6.73) |
0.268 (7.95) |
0.359 (9.03) |
0.501 (13.50) |
δ_{3} |
0.018 (1.68) |
0.021 (2.00) |
−0.028 (−1.60) |
0.006 (0.39) |
0.017 (1.32) |
0.030 (2.73) |
0.080 (7.36) |
δ_{4} |
0.013 (0.95) |
0.018 (1.43) |
−0.034 (−3.88) |
0.000 (0.11) |
0.012 (0.92) |
0.021 (1.74) |
0.060 (3.65) |
R ^{2} adj (%) |
30.3 |
9.6 |
15.1 |
23.3 |
28.1 |
35.2 |
51.9 |
Panel B: Extended model \( \frac{{feps_{t + 1} }}{{P_{t} }} = \delta_{1}^{\prime } + \delta_{2}^{\prime } \frac{{e_{t} }}{{P_{t} }} + \delta_{3}^{\prime } \frac{{b_{t} }}{{P_{t} }} + \delta_{4}^{\prime } \frac{{b_{t - 1} }}{{P_{t} }} + \delta_{5}^{\prime } \frac{{P_{t - 1} }}{{P_{t} }} + \varepsilon_{t + 1}^{\prime } \) | |||||||
\( \delta_{1}^{\prime } \) |
0.050 (11.34) |
0.014 (2.45) |
0.031 (4.77) |
0.039 (9.66) |
0.047 (11.21) |
0.057 (13.54) |
0.087 (15.20) |
\( \delta_{2}^{\prime } \) |
0.306 (11.37) |
0.094 (2.80) |
0.191 (6.88) |
0.232 (9.22) |
0.280 (11.09) |
0.385 (12.67) |
0.483 (19.77) |
\( \delta_{3}^{\prime } \) |
0.009 (0.68) |
0.016 (1.27) |
−0.016 (−1.16) |
−0.005 (−0.40) |
0.007 (0.72) |
0.019 (1.54) |
0.057 (4.24) |
\( \delta_{4}^{\prime } \) |
0.022 (1.91) |
0.015 (1.35) |
−0.015 (−1.11) |
0.012 (0.94) |
0.023 (1.96) |
0.033 (2.77) |
0.049 (4.75) |
\( \delta_{5}^{\prime } \) |
−0.001 (−0.35) |
0.008 (2.27) |
−0.017 (−6.38) |
−0.007 (−1.50) |
−0.002 (−0.44) |
0.004 (1.03) |
0.017 (3.90) |
R ^{2} adj (%) |
37.9 |
8.7 |
26.5 |
30.6 |
36.3 |
44.2 |
60.4 |
In Table 2, Panel A, using the simple model based on Eq. (10), we observe that all of the δ_{1}s and δ_{2}s are positive as predicted. We also observe that δ_{1} is highly significant with regard to explaining 1-year-ahead earnings, confirming that prices lead earnings after controlling for current earnings and book values. We also note that current earnings (δ_{2}) are an important predictor of future earnings. Neither the coefficient of lagged book value (δ_{4}) nor the coefficient of current book value (δ_{3}) is statistically significant.^{19} A similar phenomenon occurs when we examine the extended model in Panel B, where the coefficient \( \delta_{1}^{\prime } \) of price P _{ t } and the coefficient \( \delta_{2}^{\prime } \) of current earnings e _{ t } provide the bulk of the explanatory power of forecast earnings.^{20} We also observe that none of the coefficients of book value (\( \delta_{3}^{\prime } \)), lagged book value (\( \delta_{4}^{\prime } \)), and lagged price (\( \delta_{5}^{\prime } \)) is statistically significant at the 5 % level.
Implied cost of capital, growth rate, and risk premium, year by year
Years |
Sample size |
Panel A: Simple model |
Panel B: Extended model | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Cost of capital |
Growth |
RP |
Cost of capital |
Growth |
RP | ||||||
% |
t Stat |
% |
t Stat |
% |
% |
t Stat |
% |
t Stat |
% | ||
1975 |
600 |
15.18 |
43.57 |
7.61 |
13.97 |
7.40 |
15.22 |
41.53 |
7.65 |
13.23 |
7.44 |
1976 |
751 |
15.67 |
30.02 |
5.56 |
7.10 |
8.49 |
15.46 |
22.03 |
5.68 |
7.19 |
8.28 |
1977 |
1,048 |
16.83 |
37.35 |
3.99 |
6.04 |
9.84 |
16.86 |
37.22 |
4.19 |
6.07 |
9.87 |
1978 |
1,143 |
15.86 |
49.78 |
3.73 |
6.37 |
7.54 |
15.92 |
38.68 |
3.65 |
5.39 |
7.60 |
1979 |
1,144 |
15.97 |
55.14 |
3.90 |
7.65 |
6.46 |
15.99 |
52.42 |
3.91 |
6.80 |
6.48 |
1980 |
1,170 |
16.16 |
46.81 |
5.78 |
13.16 |
4.71 |
16.38 |
43.78 |
5.03 |
9.61 |
4.93 |
1981 |
1,243 |
15.18 |
63.54 |
6.09 |
11.27 |
0.93 |
15.19 |
62.70 |
6.00 |
10.40 |
0.94 |
1982 |
1,361 |
14.58 |
60.55 |
4.91 |
10.31 |
1.57 |
14.86 |
62.57 |
5.17 |
10.85 |
1.85 |
1983 |
1,409 |
12.56 |
69.94 |
5.57 |
13.36 |
1.77 |
12.31 |
45.99 |
5.78 |
13.40 |
1.52 |
1984 |
1,417 |
12.94 |
73.25 |
5.03 |
12.50 |
0.68 |
12.97 |
75.11 |
5.07 |
12.59 |
0.71 |
1985 |
1,499 |
11.74 |
59.62 |
4.81 |
10.15 |
1.62 |
11.74 |
59.65 |
4.97 |
10.50 |
1.62 |
1986 |
1,473 |
10.06 |
36.42 |
2.61 |
4.65 |
2.76 |
9.96 |
34.51 |
2.93 |
5.16 |
2.66 |
1987 |
1,502 |
10.11 |
48.51 |
3.58 |
8.52 |
2.17 |
10.17 |
48.20 |
3.37 |
7.11 |
2.23 |
1988 |
1,581 |
11.82 |
55.07 |
4.51 |
8.86 |
3.34 |
11.67 |
50.63 |
4.35 |
8.53 |
3.19 |
1989 |
1,567 |
10.89 |
51.29 |
4.38 |
9.16 |
2.39 |
10.95 |
50.33 |
4.37 |
8.28 |
2.45 |
1990 |
1,542 |
11.36 |
61.01 |
3.76 |
8.77 |
2.99 |
10.77 |
48.18 |
2.75 |
5.46 |
2.40 |
1991 |
1,597 |
10.38 |
46.08 |
4.15 |
8.76 |
3.01 |
10.42 |
45.41 |
3.84 |
7.43 |
3.05 |
1992 |
1,678 |
10.01 |
49.21 |
4.38 |
10.17 |
3.82 |
9.97 |
48.82 |
4.71 |
10.84 |
3.78 |
1993 |
1,848 |
9.36 |
44.59 |
3.78 |
8.94 |
4.22 |
9.36 |
44.74 |
3.92 |
8.62 |
4.22 |
1994 |
2,183 |
10.03 |
50.65 |
3.60 |
7.78 |
3.34 |
10.02 |
49.96 |
3.58 |
7.55 |
3.33 |
1995 |
2,451 |
10.26 |
49.58 |
4.87 |
11.27 |
3.88 |
10.23 |
48.76 |
4.72 |
9.96 |
3.85 |
1996 |
2,523 |
9.43 |
54.20 |
3.76 |
9.95 |
3.25 |
9.43 |
53.06 |
3.68 |
8.91 |
3.25 |
1997 |
2,573 |
8.54 |
42.52 |
4.01 |
10.77 |
2.32 |
8.54 |
42.77 |
4.08 |
10.28 |
2.32 |
1998 |
2,506 |
8.85 |
41.74 |
3.55 |
8.05 |
3.70 |
8.71 |
37.36 |
3.34 |
6.81 |
3.56 |
1999 |
2,330 |
9.68 |
52.90 |
3.92 |
9.61 |
4.13 |
9.38 |
45.55 |
3.34 |
7.14 |
3.83 |
2000 |
2,188 |
9.83 |
58.22 |
5.04 |
14.05 |
3.67 |
9.65 |
52.34 |
4.58 |
10.96 |
3.49 |
2001 |
2,313 |
8.06 |
38.78 |
3.83 |
8.87 |
3.50 |
8.30 |
41.82 |
4.08 |
9.86 |
3.74 |
2002 |
2,305 |
8.40 |
35.33 |
3.24 |
5.06 |
4.58 |
8.58 |
38.49 |
3.73 |
6.43 |
4.76 |
2003 |
2,317 |
8.25 |
35.73 |
3.23 |
6.37 |
5.28 |
8.27 |
35.84 |
3.40 |
6.32 |
5.30 |
2004 |
2,287 |
7.47 |
27.62 |
2.08 |
3.83 |
4.04 |
7.29 |
26.07 |
2.45 |
4.36 |
3.86 |
2005 |
2,245 |
7.70 |
28.35 |
3.34 |
5.89 |
3.65 |
7.70 |
27.84 |
3.55 |
5.81 |
3.65 |
2006 |
1,687 |
7.18 |
22.61 |
2.35 |
3.75 |
2.43 |
7.27 |
22.34 |
2.58 |
3.86 |
2.52 |
Average |
1,734 |
11.26 |
47.50 |
4.22 |
8.90 |
3.86 |
11.24 |
44.84 |
4.20 |
8.30 |
3.83 |
SD |
551 |
2.94 |
12.22 |
1.13 |
2.82 |
2.13 |
2.96 |
11.60 |
1.10 |
2.54 |
2.13 |
Minimum |
600 |
7.18 |
22.61 |
2.08 |
3.75 |
0.68 |
7.27 |
22.03 |
2.45 |
3.86 |
0.71 |
Quartile-1 |
1,397 |
9.23 |
38.42 |
3.59 |
6.92 |
2.42 |
9.20 |
38.21 |
3.51 |
6.40 |
2.44 |
Median |
1,589 |
10.19 |
48.86 |
3.96 |
8.86 |
3.57 |
10.20 |
45.48 |
4.00 |
7.91 |
3.53 |
Quartile-3 |
2,292 |
13.35 |
55.09 |
4.88 |
10.43 |
4.31 |
13.45 |
50.41 |
4.79 |
10.31 |
4.35 |
Maximum |
2,573 |
16.83 |
73.25 |
7.61 |
14.05 |
9.84 |
16.86 |
75.11 |
7.65 |
13.40 |
9.87 |
The realized return can be decomposed as the implied cost of capital (expected) component, earnings shocks, and other shocks. This has important implications since, if the information surprise in either of these components is correlated with the expected return, then simple regressions of realized returns on expected return proxies will yield spurious inferences due to correlated omitted variables.^{21}
It is relatively easy to estimate the impact of this bias on the assumption that its main impact is on the intercept term \( \delta_{1}^{\prime } \) in Eq. (11). When we adjust the values in our Table 3, using the data published in Table 1 of Easton and Sommers (2007) and make new estimates based on Eq. (9), we find that the bias affects our estimates of the cost of capital and the risk premium but not growth. The net impact of this bias is an average reduction in the cost of capital and risk premium of just 0.59 %. The impact of this bias is less than that reported using other models as is evidenced in Nekrasov and Ogneva (2011).
4.1.2 Analysis on an industry basis
The descriptive statistics for regressing forecasted earnings on price, earnings, book value, and lagged book value, industry by industry
Mean |
SD |
Minimum |
Lower quartile |
Median |
Upper quartile |
Maximum | |
---|---|---|---|---|---|---|---|
Panel A: Simple model \( \frac{{feps_{t + 1} }}{{P_{t} }} = \delta_{1} + \delta_{2} \frac{{e_{t} }}{{P_{t} }} + \delta_{3} \frac{{b_{t} }}{{P_{t} }} + \delta_{4} \frac{{b_{t - 1} }}{{P_{t} }} + \varepsilon_{t + 1} \) | |||||||
N |
1,156 |
1,165 |
36 |
260 |
888 |
1,479 |
6,287 |
δ_{1} |
0.047 (6.25) |
0.018 (2.86) |
0.005 (0.53) |
0.038 (4.42) |
0.044 (6.06) |
0.056 (8.61) |
0.107 (12.02) |
δ_{2} |
0.273 (5.12) |
0.102 (2.93) |
0.070 (0.64) |
0.211 (2.93) |
0.267 (5.24) |
0.325 (6.19) |
0.644 (14.38) |
δ_{3} |
0.020 (1.40) |
0.030 (1.77) |
−0.066 (−1.52) |
0.003 (0.11) |
0.022 (1.16) |
0.034 (2.11) |
0.096 (6.28) |
δ_{4} |
0.015 (0.88) |
0.030 (1.73) |
−0.077 (−2.19) |
−0.002 (−0.47) |
0.013 (0.85) |
0.036 (1.72) |
0.121 (5.89) |
R ^{2} adj (%) |
33.0 |
14.7 |
−1.6 |
25.6 |
33.8 |
40.4 |
71.8 |
Panel B: Extended model \( \frac{{feps_{t + 1} }}{{P_{t} }} = \delta_{1}^{\prime } + \delta_{2}^{\prime } \frac{{e_{t} }}{{P_{t} }} + \delta_{3}^{\prime } \frac{{b_{t} }}{{P_{t} }} + \delta_{4}^{\prime } \frac{{b_{t - 1} }}{{P_{t} }} + \delta_{5}^{\prime } \frac{{P_{t - 1} }}{{P_{t} }} + \varepsilon_{t + 1}^{\prime } \) | |||||||
\( \delta_{1}^{\prime } \) |
0.047 (6.94) |
0.017 (3.21) |
0.009 (1.51) |
0.037 (4.37) |
0.048 (7.13) |
0.057 (9.34) |
0.103 (13.91) |
\( \delta_{2}^{\prime } \) |
0.287 (6.99) |
0.063 (3.31) |
0.167 (1.73) |
0.248 (4.69) |
0.282 (7.00) |
0.317 (8.57) |
0.455 (15.71) |
\( \delta_{3}^{\prime } \) |
0.010 (0.82) |
0.026 (1.31) |
−0.092 (−2.36) |
0.001 (0.09) |
0.010 (0.62) |
0.022 (1.45) |
0.068 (4.25) |
\( \delta_{4}^{\prime } \) |
0.022 (1.59) |
0.028 (1.91) |
−0.047 (−3.53) |
0.007 (0.27) |
0.024 (1.52) |
0.035 (2.65) |
0.110 (7.16) |
\( \delta_{5}^{\prime } \) |
0.000 (0.12) |
0.009 (1.30) |
−0.026 (−2.17) |
−0.003 (−0.57) |
0.000 (−0.02) |
0.005 (0.59) |
0.027 (3.39) |
R ^{2} adj (%) |
39.8 |
11.8 |
7.6 |
31.7 |
39.5 |
44.2 |
73.3 |
In the case of the simple model, again we observe that the dominant explanatory variables are price, (δ_{1}), and earnings, (δ_{2}). All 48 parameter estimates of the coefficients of price and earnings are positive.^{22} The coefficients of book value and lagged book value are positive but not statistically significant. When we examine the extended model, we again find that the dominant explanatory variables are associated with price \( (\delta_{1}^{\prime } ) \) and earnings \( (\delta_{2}^{\prime } ) \). The coefficients of (lagged) book values and lagged price are positive but not statistically significant.
Implied cost of capital, growth rate, and valuation parameters, industry by industry
Industry |
N |
Panel A: Simple model |
Panel B: Extended model | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Cost of capital |
Growth |
RP |
Cost of capital |
Growth |
RP | ||||||
% |
t Stat |
% |
t Stat |
% |
% |
t Stat |
% |
t Stat |
% | ||
Agric |
140 |
11.93 |
8.97 |
7.47 |
4.56 |
2.25 |
11.54 |
8.09 |
6.33 |
4.95 |
2.52 |
Food |
1,103 |
11.69 |
43.36 |
5.81 |
6.22 |
4.03 |
11.35 |
54.35 |
5.54 |
8.06 |
3.63 |
Soda |
116 |
6.31 |
23.65 |
−3.25 |
−1.32 |
0.15 |
6.47 |
24.23 |
−2.75 |
−1.34 |
0.31 |
Beer |
128 |
7.06 |
27.97 |
−1.84 |
−1.16 |
−0.24 |
6.58 |
27.35 |
−1.50 |
−1.09 |
−0.44 |
Smoke |
36 |
15.71 |
56.34 |
3.80 |
1.82 |
6.67 |
14.83 |
9.99 |
4.27 |
3.32 |
7.16 |
Toys |
264 |
11.94 |
18.72 |
4.28 |
2.78 |
4.74 |
11.41 |
23.71 |
3.87 |
2.97 |
3.92 |
Fun |
715 |
9.79 |
24.23 |
1.50 |
1.22 |
2.35 |
9.65 |
44.02 |
1.35 |
1.41 |
2.29 |
Books |
712 |
10.89 |
16.27 |
4.73 |
1.87 |
3.73 |
10.07 |
24.19 |
3.42 |
1.74 |
2.90 |
Hshld |
1,195 |
12.49 |
38.99 |
5.39 |
5.34 |
4.74 |
12.29 |
63.77 |
4.56 |
6.06 |
4.49 |
Clths |
872 |
11.51 |
44.09 |
4.30 |
4.67 |
3.93 |
11.51 |
76.02 |
4.64 |
8.02 |
3.98 |
Hlth |
737 |
9.54 |
18.54 |
4.10 |
3.64 |
3.16 |
9.24 |
20.64 |
3.53 |
3.40 |
2.82 |
MedEq |
1,368 |
9.82 |
13.09 |
5.97 |
2.67 |
0.90 |
8.75 |
16.19 |
4.30 |
3.67 |
0.80 |
Drugs |
1,669 |
7.75 |
1.97 |
6.53 |
2.33 |
−3.94 |
9.07 |
10.54 |
7.23 |
5.28 |
−0.75 |
Chems |
1,296 |
12.52 |
25.70 |
6.61 |
3.54 |
4.86 |
11.82 |
36.82 |
5.69 |
5.31 |
4.15 |
Rubbr |
527 |
11.92 |
23.47 |
5.40 |
6.04 |
3.98 |
11.56 |
29.73 |
4.68 |
6.10 |
3.62 |
Txtls |
572 |
12.76 |
33.25 |
4.81 |
7.67 |
4.38 |
12.83 |
42.00 |
4.12 |
6.68 |
4.50 |
BldMt |
1,447 |
12.80 |
64.34 |
7.04 |
5.57 |
4.82 |
12.35 |
84.30 |
5.16 |
7.99 |
4.35 |
Cnstr |
657 |
12.75 |
53.33 |
5.20 |
4.63 |
5.16 |
12.21 |
54.61 |
4.25 |
5.49 |
4.73 |
Steel |
1,164 |
11.86 |
40.59 |
2.68 |
2.80 |
4.09 |
11.59 |
64.74 |
2.84 |
4.14 |
3.86 |
FabPr |
246 |
11.56 |
28.56 |
3.12 |
2.68 |
3.90 |
11.82 |
25.24 |
3.12 |
2.32 |
4.06 |
Mach |
2,277 |
11.30 |
49.24 |
5.12 |
6.17 |
3.19 |
11.22 |
49.10 |
4.92 |
7.71 |
3.24 |
ElcEq |
764 |
12.12 |
13.99 |
5.13 |
2.52 |
3.17 |
12.20 |
16.97 |
5.48 |
3.36 |
3.33 |
Other |
222 |
12.67 |
19.87 |
9.92 |
5.77 |
5.86 |
12.31 |
33.39 |
7.13 |
7.61 |
4.48 |
Autos |
1,190 |
12.85 |
45.66 |
7.14 |
4.43 |
4.85 |
11.91 |
58.11 |
5.05 |
7.77 |
4.16 |
Aero |
394 |
11.91 |
65.20 |
4.17 |
2.68 |
4.06 |
11.85 |
103.63 |
3.63 |
2.74 |
3.61 |
Ships |
216 |
13.54 |
47.56 |
10.29 |
8.99 |
5.36 |
13.26 |
42.87 |
8.86 |
15.25 |
4.99 |
Guns |
57 |
12.89 |
34.43 |
8.13 |
3.37 |
5.99 |
12.77 |
35.90 |
7.47 |
3.48 |
5.60 |
Gold |
188 |
5.69 |
4.14 |
4.91 |
2.30 |
−1.37 |
4.95 |
3.75 |
2.29 |
2.12 |
−1.93 |
Mines |
175 |
14.54 |
6.31 |
5.93 |
1.35 |
5.74 |
12.78 |
10.91 |
5.34 |
2.13 |
4.23 |
Coal |
84 |
8.36 |
11.06 |
−0.88 |
−0.72 |
−0.10 |
9.51 |
11.63 |
0.17 |
0.19 |
1.18 |
Oil |
2,075 |
10.07 |
28.49 |
3.69 |
3.18 |
1.94 |
9.94 |
37.53 |
3.91 |
5.45 |
1.90 |
Util |
2,864 |
11.37 |
59.87 |
7.21 |
5.75 |
3.97 |
11.03 |
82.15 |
6.36 |
7.04 |
3.53 |
Telcm |
975 |
6.95 |
9.27 |
1.23 |
1.00 |
−0.37 |
7.15 |
20.02 |
0.87 |
1.17 |
−0.14 |
PerSv |
461 |
9.39 |
22.56 |
4.74 |
4.55 |
2.34 |
9.22 |
17.93 |
4.77 |
4.00 |
2.25 |
BusSv |
3,677 |
9.55 |
19.00 |
4.17 |
3.65 |
1.72 |
10.01 |
38.10 |
4.81 |
8.23 |
2.22 |
Comps |
1,864 |
9.74 |
7.32 |
6.19 |
6.11 |
0.94 |
10.79 |
27.11 |
5.42 |
7.91 |
2.57 |
Chips |
2,831 |
9.94 |
25.30 |
4.24 |
3.29 |
2.11 |
10.45 |
39.89 |
5.15 |
6.84 |
2.63 |
LabEq |
1,366 |
10.04 |
17.34 |
4.68 |
5.11 |
1.69 |
10.41 |
27.51 |
5.23 |
6.19 |
2.24 |
Paper |
1,153 |
11.51 |
71.06 |
3.36 |
3.24 |
3.99 |
11.37 |
70.64 |
3.47 |
3.65 |
3.89 |
Boxes |
278 |
11.60 |
35.37 |
3.54 |
1.15 |
3.57 |
11.29 |
37.59 |
3.83 |
2.50 |
3.57 |
Trans |
1,377 |
11.37 |
51.03 |
5.80 |
3.63 |
3.91 |
10.87 |
60.22 |
3.84 |
6.69 |
3.48 |
Whlsl |
1,929 |
11.27 |
54.45 |
5.46 |
6.34 |
3.79 |
11.00 |
74.80 |
4.49 |
8.05 |
3.50 |
Rtail |
3,196 |
11.62 |
75.64 |
5.52 |
6.80 |
4.06 |
10.97 |
135.22 |
4.28 |
8.47 |
3.18 |
Meals |
904 |
10.27 |
18.07 |
3.79 |
2.75 |
2.96 |
10.41 |
22.90 |
3.37 |
2.75 |
2.73 |
Banks |
6,287 |
12.05 |
107.44 |
7.61 |
8.16 |
5.68 |
12.03 |
226.58 |
7.16 |
11.47ara> |
5.58 |
Insur |
1,941 |
11.34 |
114.80 |
4.53 |
7.20 |
4.74 |
11.28 |
151.14 |
3.77 |
6.50 |
4.62 |
RlEst |
196 |
9.94 |
12.23 |
3.10 |
2.46 |
1.51 |
10.20 |
22.43 |
2.00 |
1.48 |
1.62 |
Fin |
1,576 |
9.77 |
18.10 |
5.15 |
3.29 |
4.01 |
9.69 |
44.80 |
4.42 |
5.21 |
3.48 |
Summary statistics of cost of capital, growth rate, and risk premia by industry
Industry |
N |
All firms | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Panel A: Simple model |
Panel B: Extended model | ||||||||||
Cost of capital |
Growth |
Risk premium |
Cost of Capital |
Growth |
Risk premium | ||||||
% |
t Stat |
% |
t Stat |
% |
% |
t Stat |
% |
t Stat |
% | ||
Average |
1,156 |
10.96 |
34.38 |
4.74 |
3.79 |
3.19 |
10.79 |
46.74 |
4.21 |
5.01 |
3.10 |
SD |
1,165 |
2.02 |
24.90 |
2.52 |
2.31 |
2.12 |
1.83 |
40.77 |
2.13 |
3.15 |
1.73 |
Minimum |
36 |
5.69 |
1.97 |
−3.25 |
−1.32 |
−3.94 |
4.95 |
3.75 |
−2.75 |
−1.34 |
−1.93 |
Quartile-1 |
260 |
9.82 |
17.89 |
3.80 |
2.51 |
2.07 |
9.99 |
22.78 |
3.51 |
2.74 |
2.28 |
Median |
888 |
11.44 |
26.83 |
4.86 |
3.46 |
3.90 |
11.25 |
37.17 |
4.36 |
5.24 |
3.49 |
Quartile-3 |
1,479 |
12.07 |
47.98 |
5.94 |
5.61 |
4.74 |
11.86 |
58.64 |
5.26 |
7.18 |
4.15 |
Maximum |
6,287 |
15.71 |
114.80 |
10.29 |
8.99 |
6.67 |
14.83 |
226.58 |
8.86 |
15.25 |
7.16 |
Industry |
N |
Firms with a positive earnings forecast | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Panel C: Simple model |
Panel D: Extended model | ||||||||||
Cost of capital |
Growth |
Risk premium |
Cost of capital |
Growth |
Risk premium | ||||||
% |
t Stat |
% |
t Stat |
% |
% |
t Stat |
% |
t Stat |
% | ||
Average |
1,098 |
11.34 |
42.54 |
5.13 |
4.69 |
3.90 |
10.98 |
55.00 |
4.38 |
5.79 |
3.51 |
SD |
1,133 |
1.86 |
30.70 |
2.41 |
2.56 |
1.60 |
1.73 |
44.01 |
2.09 |
3.73 |
1.40 |
Minimum |
35 |
5.59 |
5.67 |
−1.99 |
−1.23 |
−1.58 |
5.61 |
5.18 |
−2.55 |
−1.06 |
−0.89 |
Quartile-1 |
253 |
10.50 |
21.33 |
4.43 |
3.33 |
3.41 |
10.34 |
25.58 |
3.85 |
3.04 |
2.95 |
Median |
833 |
11.61 |
39.67 |
5.49 |
4.78 |
4.07 |
11.26 |
44.84 |
4.57 |
6.10 |
3.68 |
Quartile-3 |
1,370 |
12.26 |
54.35 |
6.46 |
6.26 |
4.70 |
12.05 |
70.40 |
5.39 |
8.13 |
4.45 |
Maximum |
6,262 |
16.40 |
179.16 |
10.15 |
9.57 |
7.10 |
14.60 |
241.44 |
9.09 |
19.95 |
5.76 |
4.2 Comparison of our results with prior literature
Correlation and statistics of risk premia estimated in this paper and prior studies
Correlations |
This paper |
GLS |
FF |
---|---|---|---|
Panel A: Comparison of risk premia on an industry basis | |||
This paper |
1 | ||
GLS |
0.420*** |
1 | |
FF |
0.335** |
−0.311** |
1 |
Percentage returns | |||
Mean |
3.10 |
2.50 |
6.46 |
SD |
1.73 |
1.94 |
2.24 |
Minimum |
−1.93 |
−2.79 |
0.09 |
Lower quartile |
2.28 |
1.46 |
5.68 |
Median |
3.49 |
2.34 |
6.49 |
Upper quartile |
4.15 |
3.23 |
7.78 |
Maximum |
7.16 |
8.38 |
11.16 |
This paper |
GLS |
ETSS |
CT |
GM |
FF | |
---|---|---|---|---|---|---|
Panel B: Comparison of risk premia on a yearly basis | ||||||
This paper |
1 | |||||
GLS |
0.918*** |
1 | ||||
ETSS |
0.762*** |
0.852*** |
1 | |||
CT |
0.203 |
0.576** |
−0.094 |
1 | ||
GM |
0.522** |
0.339 |
0.467 |
0.053 |
1 | |
FF |
0.329* |
0.210 |
−0.035 |
−0.123 |
0.158 |
1 |
Sample period |
Percentage returns | |||||
---|---|---|---|---|---|---|
1975–2006 |
1979–1995 |
1981–1998 |
1985–1998 |
1984–1998 |
1981–2006 | |
3.83 |
2.49 |
5.31 |
3.40 |
5.52 |
5.96 | |
3.53 |
2.80 |
5.60 |
3.44 |
5.50 |
5.23 | |
Common period: 1985–1995 | ||||||
Mean |
2.98 |
3.17 |
5.66 |
3.49 |
5.53 |
5.35 |
Lower quartile |
2.42 |
2.70 |
5.25 |
3.10 |
5.20 |
−5.56 |
Median |
3.05 |
3.30 |
5.70 |
3.54 |
5.60 |
13.57 |
Upper quartile |
3.56 |
3.70 |
6.05 |
3.81 |
6.00 |
17.10 |
Although the industry classification is common, the sample sizes vary both within industries and over time. Our estimates are based on the period of 1975–2006. In contrast, that of Fama and French covers the period of 1963–1994, while the results reported by Gebhardt et al. (2001) cover the shorter period of 1979–1995. Their annual average sample size is on the order of 1,150, while ours is about 1,734. Although the correlation coefficients of 0.42 and 0.335 between our estimate and the other two over the common period of their estimation are just about significant at a 1 and 5 % levels respectively, there remains substantial unexplained variability between the various estimates.
Rather more authors have reported annual risk premia over a number of years, and Panel B summarizes a statistical comparison of the estimates in this paper compared with those made by Fama and French (1997), Claus and Thomas (2001), Gebhardt et al. (2001), Easton et al. (2002), and Gode and Mohanram (2003). We observe that, over the common period, ours is the lowest estimate. However, bear in mind that, with the exception of Fama and French (1997), we have also the largest sample because we require only 1-year-ahead forecasts, and we have included rather more loss-making firms and firms with limited number of forecasts. We again note in this context that the risk premium reported by Gode and Mohanram (2003) falls to just over 1 %, when they use a residual income model and include firms with negative time t + 1 and t + 2 periods forecasted earnings, feps _{1}, feps _{2} < 0, to estimate the industry median return on equity.
In general, the estimates are highly variable but rising in the early years with some evidence of stabilization in the later years. Although there is a distinct difference in levels between the estimates provided by Easton et al. (2002) and by Gode and Mohanram (2003) and the estimates by Gebhardt et al. (2001), and this paper, there appears to be some agreement between the changes in the estimated risk premia.
5 Conclusion
We devise and explore a new methodology for estimating simultaneously the implied long-run growth rate and the corresponding implied cost of equity capital. The major difference between our approach and that in prior literature is that ours avoids the necessity to make assumptions about terminal values and consequently about future growth rates. The need for just 1-year-ahead forecast earnings, together with the absence of specific assumptions on dividend payout rates, has enabled us to use a larger data set than previous researchers. It has also enabled estimates of the equity risk premium on a year-by-year basis over a 30-year period.
Our model establishes in analytical form the relationship between future earnings, current price, and accounting fundamentals and the relationship between the implied cost of equity capital and accounting risk factors, such as earnings-to-price, book-to-price, and dividend yield. Finally the relationship between realized returns, forecasts of earnings, and the implied cost of capital facilitates a simple correction for any bias due to analysts’ optimism.
The subsequent implementation of the model produces consistent estimates of the cost of capital of between 10.8 and 11.3 % and estimates of the risk premium between 3.1 and 3.9 %. Although this value is lower than most previous studies, we include companies with short forecast histories and companies with negative forecasts of future earnings. Thus this larger data set reduces the effect of survivorship bias. Our estimate of the long-run nominal growth in share prices is between 4.2 and 4.7 %. This is relatively low in historical terms but, interestingly, coincides with the average estimation based on the risk-free rate less 3 %, and agrees with the forecasts produced by the Congressional Budget Office. We have compared our estimates of the risk premia and growth with previous research where possible. Here there is evidence of agreement in general trends but rather more disagreement in the actual level. Again though, any comparison is confounded by the differing sample sizes and modeling assumptions.
Both Gebhardt et al. (2001) and Liu et al. (2002) use a residual income valuation model to deduce the cost of capital, and both rely on the estimation of the industry median of ROE. Their results show that the cost of capital estimates are sensitive to how one deals with loss firms when calculating the industry median ROE.
Ibbotson Associates (2006) use 30-day T-bill rate to infer equity premium from observed returns. Others use the 10-year T-bond as the risk-free rate to incorporate long-term future cash flows based on forward-looking approaches. However, the Ibbotson estimates are substantially higher even if one considers the difference between these two risk-free rates.
O’Hanlon and Steele (2000) estimate the UK equity premium at 4 % based on a realized earnings model. Dimson et al. (2011) find that, taking US government bonds as the risk-free asset, the annualized risk premium over the period 1926–2006 is 6.6 % and is 5.6 % over the period that we investigate 1975–2006.
Siegel and Thaler (1997) provide a good summary of the early literature on equity premium estimations.
The paper by Nekrasov and Ogneva (2011) is a refinement of the approach adopted in Easton et al. (2002).
Estimates of the rate of change in abnormal growth in earnings (g _{ agr }) in Easton (2004) are often negative (Easton 2009, p. 273).
We could develop a similar expression using net dividends, but it turns out to be more convenient to work with book values and changes in book value. Unlike most prior studies, we need not calculate forecasted book value based on the clean-surplus assumption on a per share basis. In other words, our model of estimation is initially developed on a total dollar basis.
Easton and Sommers (2007) essentially use a simpler form of our valuation model. Their valuation equation is equivalent to \( P_{t} = b_{t} + \frac{{E[e_{t + 1} ] - (R^{E} - 1)b_{t} }}{{R^{E} - 1 - g^{E} }} \), which can be written as \( E[e_{t + 1} ] = (R^{E} - 1 - g^{E} )P_{t} + g^{E} b_{t} . \) This is a special case in our Eqs. (1) and (5), with α_{1} = 1, α_{2} = 0, and P _{ t } = b _{ t } + ϑ_{ t }.
Once we have estimated α_{j} (j = 1, 2, 3) in Eq. (1), non-accounting information can be eventually estimated. In fact, we find that the accounting fundamental component is close to 80 % of equity value based on our estimated parameters.
Note that the valuation model summarized in Proposition 2(3a) in Feltham and Ohlson (1996), \( P_{t} = oa_{t} + \alpha_{1} ox_{t}^{a} + \alpha_{2} oa_{t - 1} + \alpha_{3} ci_{t} \), together with no-arbitrage condition, implies that operating earnings can be expressed in terms of equity price, operating assets, and investment, \( ox_{t + 1} = \frac{R}{{(1 + \alpha_{1} )}}P_{t} - \frac{{(1 + \alpha_{2} - \alpha_{1} (R - 1))}}{{(1 + \alpha_{1} )}}oa_{t} - \frac{\omega }{{(1 + \alpha_{1} )}}\alpha_{3} ci_{t} \). This is equivalent to Eq. (3) above. Therefore the positive NPV investment, which grows at a rate g, in Feltham and Ohlson (1996) can be viewed as a proxy of our “other information”.
Lundholm and Sloan (2007) offer a tight guideline for sales/earnings growth rate. They state that “in the past decade, it (the nominal GDP growth rate) has been closer to 5 percent and the Congressional Budget Office estimates 5 percent nominal GPD growth through 2012 (3 percent real growth and 2 percent price inflation).”
Claus and Thomas (2001) argue that expected growth is affected by both the expectation of future economic rents and the conservative nature of accounting. The effects of accounting conservatism on the short horizon forecasts of earnings will differ from firm to firm and thus affect the base from which earnings are assumed to grow in perpetuity (Easton 2009).
Easton (2009) argues that “(abnormal return on equity) will reflect both real growth and a correction for GAAP differences between short-run forecasts of earnings and economic earnings.”
Many penny firms have small market capitalizations. Easton and Sommers (2007) argue that small stocks have an undue effect on the estimate of the market return.
Winsorizing the extreme percentiles does not change our main results. We also note that, even after this cut, our sample size is still larger than all similar published studies.
This would restrict us to the few firms with 30 continuous years of history. We did estimate the parameters for individual firms with at least 20 observations. Although we found that the average cost of capital was not significantly different, our estimate of the long-run growth rate was significantly higher at around 9 %, which may reflect survivorship or success bias.
Since the error terms in Eqs. (10) and (11) may be heteroskedastic, we also use White (1980) corrections to the standard errors in our estimations. Following Easton and Summers (2007) and applying value-weighted regressions, we find that the main results are largely unaltered.
We find that it makes little difference when we introduce dirty surplus earnings in estimating the growth rate and the cost of capital. The estimated growth rate and cost of capital are also robust to the deflator we used, such as market index and lagged price. Our results are also robust with or without intercepts in our regression when we use per share data without deflation.
We also ran all our models using just fiscal year-end prices and found that there was little difference in the results.
Elton (1999) argues information surprises cause realized returns to be a biased, noisy measure of expected returns.
We use the procedure nlcom in Stata to determine the t-statistics for functions of the regression parameters.
The average quoted is a simple arithmetic average over years or industries and is not weighted by the number of observations.
In the case of the gold industry, when we consider only positive earnings forecasts, the sample size falls from 188 to 147 but we still find that a negative risk premium of 1.6 %. In fact, the gold industry is the only industry with negative risk premium when we restrict our sample to only those firms with positive earnings forecasts.
We tried other commonly used risk proxies such as beta and size but the nonhomogeneity of the data in the sector produced insignificant results, though Easton (2009) argues that “given that the theoretical models are questionable, it is illogical to use measures based on these models (for example, CAPM beta) to evaluate the validity of an accounting-based proxy.”
The growth estimated by Easton et al. is growth in residual income. However, we would argue that growth in residual income should converge to that of earnings in the long run.
Acknowledgments
The authors appreciate the many helpful comments received from participants at the EAA 2011 and BAA 2011 conferences, faculty at the Victoria University Wellington, University of Otago, University of Exeter, and University of Bristol. We would also like to acknowledge comments from Martin Staehle, Mark Clatworthy, Alan Gregory, and two anonymous reviewers. Finally we would particularly like to express our thanks to the editor, Jim Ohlson, for his many insightful suggestions. Wang is grateful to Inquire-UK for funding support of this project. This article represents the views of the author(s) and not of Inquire UK.
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