Optimal multifactor trading under proportional transaction costs
Proportional transaction costs present difficult theoretical problems in trading algorithm design, on account of their lack of analytical tractability. The author derives a solution of DT-NT-DT form for an arbitrary model in which the the traded asset has diffusive dynamics described by one or more stochastic risk factors. The width of the NT zone is found to be, as expected, proportional to the cube root of the transaction cost. It is also proportional to the 2/3 power of the volatility of the target position, thereby causing a faster trading strategy to be buffered more than a slower one. The displacement of the middle of the buffer from the costfree position is found to be proportional to the square of the width, and hence to the 2/3 power of the transaction cost; the proportionality constant depends on the expected short-term change in position.
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- A. E. Whalley & P. Wilmott, 1997. "An Asymptotic Analysis of an Optimal Hedging Model for Option Pricing with Transaction Costs," Mathematical Finance, Wiley Blackwell, vol. 7(3), pages 307-324.
- Nicolae B. Garleanu & Lasse H. Pedersen, 2009.
"Dynamic Trading with Predictable Returns and Transaction Costs,"
NBER Working Papers
15205, National Bureau of Economic Research, Inc.
- Nicolae Gârleanu & Lasse Heje Pedersen, 2013. "Dynamic Trading with Predictable Returns and Transaction Costs," Journal of Finance, American Finance Association, vol. 68(6), pages 2309-2340, December.
- Garleanu, Nicolae Bogdan & Pedersen, Lasse Heje, 2009. "Dynamic Trading with Predictable Returns and Transaction Costs," CEPR Discussion Papers 7392, C.E.P.R. Discussion Papers.
- Richard Martin & Torsten Sch\"oneborn, 2011. "Mean Reversion Pays, but Costs," Papers 1103.4934, arXiv.org.
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