Option Replication With Transaction Costs
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Author | : Anthony Neuberger |
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Total Pages | : |
Release | : 1998 |
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In the presence of proportional transactions costs, the tightest bounds that can be imposed on the price of a call option when the asset price follows a geometric diffusion are those imposed by static portfolio strategies. The price of a call is bounded above by the value of the asset and below by its intrinsic value. However, with a pure jump process it is possible to obtain much tighter arbitrage bounds on the value of a contingent claim, which converge to the no-transaction-cost valuation as transaction costs become small.
Author | : Lionel Martellini |
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Total Pages | : 31 |
Release | : 2001 |
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In the presence of transaction costs, a risk-return trade-off exists between the quality and the cost of a replicating strategy. In that context, I show how to expand the set of all possible time-based strategies through the introduction of a multi-scale class of strategies, which consist in rebalancing different fractions of an option portfolio at different time frequencies. The method, based on time-scale diversification, is to dynamic replication what investment in diversified portfolios is to static portfolio selection: in a dynamic context, one may enjoy the benefits of diversification by using different time scales in trading the same asset.
Author | : Stylianos Perrakis |
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Total Pages | : 47 |
Release | : 1999 |
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Author | : Phelim P. Boyle |
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Total Pages | : 23 |
Release | : 1992 |
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Author | : Ariane Reiss |
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Total Pages | : 25 |
Release | : 1999 |
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Contrary to a continuous-time model, in a discrete-time binomial model it is possible to construct a self-financing strategy which exactly replicates the payoff of a European option contract at maturity in the presence of proportional transactions costs. We derive an upper boundary for the cost factor in a market where all investors face the same factor. This upper boundary ensures the efficiency of the riskfree bond price as well as the stock price process. It turns out that perfect replication is optimal in the presence of only one transactions costs factor. Furthermore, conditions are given under which superreplicating strategies are dominant under differential transactions costs. A closed-form solution for the value of a Short call option is derived. While this least initial endowment is preference-free, the individual replicating strategy is preference-dependent. In addition, we show how the value of a Long European call option is derived computationally easily.
Author | : Laura Cavallo |
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Total Pages | : 15 |
Release | : 1999 |
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Author | : Malene Sun Kim Friis |
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Total Pages | : 44 |
Release | : 2011 |
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Author | : Hayne E. Leland |
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Total Pages | : 28 |
Release | : 1984 |
Genre | : Options (Finance) |
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Author | : Klaus Bjerre Toft |
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Total Pages | : |
Release | : 1999 |
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This paper analyzes the tradeoff between cost and risk of discretely rebalanced option hedges in the presence of transactions costs. I present closed form solutions for expected hedging error, transactions costs, and variance of the cash-flow from a time based hedging strategy similar to that analyzed by Leland (1985). Furthermore, I characterize the cost and risk of a move based hedging strategy without resorting to Monte Carlo simulations. All results are sufficiently general to accommodate the use of a transactions costs adjusted hedging volatility and an asset rate of return which differs from the riskfree rate of return.
Author | : Valeriy Zakamulin |
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Total Pages | : 20 |
Release | : 2016 |
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In a market with transaction costs the option hedging is costly. The idea presented by Leland (1985) was to include the expected transaction costs in the cost of a replicating portfolio. The resulting Leland's pricing and hedging method is an adjusted Black-Scholes method where one uses a modified volatility in the Black-Scholes formulas for the option price and delta. The Leland's method has been criticized on different grounds. Despite the critique, the risk-return tradeoff of the Leland's strategy is often better than that of the Black-Scholes strategy even in the case when a hedger starts with the same initial value of a replicating portfolio. This implies that the Leland's modification of volatility does optimize somehow the Black-Scholes hedging strategy in the presence of transaction costs. In this paper we explain how the Leland's modified volatility works and show how the performance of the Leland's hedging strategy can be improved by finding the optimal modified volatility. It is not claimed that the Leland's hedging strategy is optimal. Rather, the optimization mechanism of the modified hedging volatility can be exploited to improve the risk-return tradeoffs of other well-known option hedging strategies in the presence of transaction costs.