摘要(英) |
In the recent years, the warrant market in Taiwan is highly developed. Securities firms have to construct a hedge ratio to lock their cost at issuing the warrants. In general, securities firms use the delta-hedging strategy basis on the Black and Scholes model which is broadly used to evaluate the option price. This paper discusses the Taiwan weighted stock option which is the warmest product in current market and mainly examines that the Black and Scholes model is overly simplified assumptions for the costs of hedging has a very big impact, and the introduction of the Jarrow and Rudd model as a basis for comparison. Empirical results show that calculating the volatility by the Jarrow and Rudd model will let the volatility smile become flatter than the Black and Scholes. In other words, Securities firms will get a stable hedging cost no matter the issuing warrant is in-the-money, at-the-money or out-of-the-money. That is a better result for issuing firms to evaluating the hedging cost. |
參考文獻 |
1. 許明廉(2000),指數型認購權證之delta避險研究,國立臺灣大學商學研究所碩士論文
2. 張傳章(2004),期貨與選擇權,雙葉書廊有限公司
3. Corrado, C.J. and Su, T. (1996): Skewness and kurtosis in S&P 500 Index returns implied by option prices, J. Financial Research, 19(2), 175–192.
4. Whaley, R.E. (1982): Valuation of American call options on dividend paying stocks, The Journal of Financial Economics, 10(1), 29–58.
5. Merton, R.C. (1973): The theory of rational option pricing, The Bell Journal of Economics and Management Science, 4(1), 141–83.
6. Corrado, C.J. and Su, T. (1996): S&P500 Index option tests of Jarrow and Rudd’s approximate option valuation formula. The Journal of Futures Markets, 16(6), 611-629
7. Corrado, C.J. and Su, T. (1997): Implied volatility skews and stock index skewness and kurtosis implied by S&P 500 index option prices, The Journal of Derivatives, 4(4) , 8-19
8. Corrado, C.J. and Su, T. (1997): Implied volatility skews and stock return skewness and kurtosis implied by stock option prices, The European Journal of Finance, 3(1) , 73-85
9. Brown and Robinson (2002): Skewness and kurtosis implied by option prices: A correction , The Journal of Financial Research, 25(2) , 279-282
10. Fillo and Rosenfeld (2004):Testing option pricing with the Edgeworth expansion , Physica A: Statistical Mechanics and its Applications, 344(3), 484-490
11. Hull, J.C.(2012): Options, Futures, and Other Derivatives 8th edition,
12. Jarrow, R and Rudd, A (1982): Approximate option valuation for arbitrary stochastic processes, Journal of Financial Economics, 10(3), 347-369 |