Abstract
This paper studies superhedging of contingent claims in illiquid markets where trading costs may depend nonlinearly on the traded amounts and portfolios may be subject to constraints. We give dual expressions for superhedging costs of financial contracts where claims and premiums are paid possibly at multiple points in time. Besides classical pricing problems, this setup covers various swap and insurance contracts where premiums are paid in sequences. Validity of the dual expressions is proved under new relaxed conditions related to the classical no-arbitrage condition. A new version of the fundamental theorem of asset pricing is given for unconstrained models with nonlinear trading costs.
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Pennanen, T. Dual representation of superhedging costs in illiquid markets. Math Finan Econ 5, 233–248 (2011). https://doi.org/10.1007/s11579-012-0061-x
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DOI: https://doi.org/10.1007/s11579-012-0061-x