Abstract
We show that several general classes of stochastic processes satisfy a functional co-monotony principle, including processes with independent increments, Brownian bridge, Brownian diffusions, Liouville processes, fractional Brownian motion. As a first application, we recover and extend some recent results about peacock processes obtained by Hirsch et al. in (Peacocks and Associated Martingales, with Explicit Constructions, Bocconi & Springer, 2011, 430p) [see also (Peacocks sous l’hypothèse de monotonie conditionnelle et caractérisation des 2-martingales en termes de peacoks, thèse de l’Université de Lorraine, 2012, 169p)] which were themselves motivated by a former work of Carr et al. in (Finance Res. Lett. 5:162–171, 2008) about the sensitivities of Asian options with respect to their volatility and residual maturity (seniority). We also derive semi-universal bounds for various barrier options.
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Notes
- 1.
Stands for the French acronym PCOC (Processus Croissant pour l’Ordre Convexe).
- 2.
For every α, β, γ ∈ E and every \(\lambda \in \mathbb{R}_{+}\), α ≤ β ⇒ α + γ ≤ β + γ and λ ≥ 0 ⇒ λ α ≤ λ β.
- 3.
The fact that \(A(L_{_{T}}^{2})\) is the Cameron–Martin space i. e. the reproducing space of the covariance operator, which is obvious here, is a general fact for any such decomposition (see [16]).
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The author thanks the anonymous referee for constructive suggestions and F. Panloup for his help.
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Pagès, G. (2013). Functional Co-monotony of Processes with Applications to Peacocks and Barrier Options. In: Donati-Martin, C., Lejay, A., Rouault, A. (eds) Séminaire de Probabilités XLV. Lecture Notes in Mathematics(), vol 2078. Springer, Heidelberg. https://doi.org/10.1007/978-3-319-00321-4_15
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