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title page
Abstract
Contents
Chapter 1. Introduction 15
Chapter 2. Estimating and testing optin pricing models in an economy with transaction costs 19
1. Introduction 20
2. Implied volatility and option pricing model 22
2.1. Black-scholes model and implied volatility 22
2.2. Alternative models 24
3. Estimating option pricing parameters in a black-scholes economy with transaction costs 26
3.1. Data generation by simulation 27
3.2. Volatility smile 28
3.3. Parameter estimation of option pricing models 29
4. Estimating option pricing parameters in a stochastic volatility or jump economy with transaction costs 31
5. Hedging performance 33
5.1. Single-instrument hedges 33
5.2. Delta-neutral hedges 35
6. Conclusion 36
Chapter 3. The Impact of net buying pressure on implied volatility : The learning hypothesis versus the limit of arbitrage hypothesis 55
1. Introduction 56
2. Net Buying pressure hypotheses 58
3. Data 62
3.1. Data specification 62
3.2. Classification of options 63
3.3. Net buying pressure and investor types 64
4. Empirical analysis 67
4.1. Daily regressions 68
4.1.1. Empirical methodology for daily regressions 68
4.1.2. Daily regression results 71
4.2. Intraday regressions 74
5. Conclusion 80
Chapter 4. The dynamics of trades and quote revisions across stock, futures, and option markets 92
1. Introduction 93
2. What influences trade and quote revisions? 96
2.1. Information effect 97
2.2. Liquidity effect 98
2.3. Hypothetical market dynamics 99
3. Data 102
3.1. KOSPI 200 index and its derivatives 102
3.2. Summary statistics 104
4. Empirical analysis 105
4.1. Information content of return and order imbalances 105
4.2. Lead-lag relations among order imbalances and returns across markets 107
4.3. The Dynamics of returns and order imbalances across markets 109
4.4. Investor groups and market dynamics of returns 113
5. Conclusion 115
Chapter 5. Tests of alternative models for the pricing of korean treasury bond futures contracts 125
1. Introduction 126
2. Pricing the KTB futures 129
2.1. The specifications of the KTB futures 129
2.2. The ad-hoc cost-of-carry futures price 130
2.3. The theoretical price for KTB futures contracts 131
2.4. Term structure based futures pricing models 133
3. Parameter estimation 135
3.1. Single factor models 135
3.2. The Hull-White two-factor model 136
4. Empirical results 138
4.1. Data 138
4.2. Comparison between the market price and the model prices of the KTB futures contracts 138
4.3. Determinants of pricing errors 141
5. Exploiting the underpricing phenomenon in the KTB futures market 143
5.1. Investment and hedging strategies 143
5.2. Results 145
6. Conclusion 146
Chapter 6. Concluding remarks 153
요약문 155
References 157
Acknowledgements 164
Curriculum vitae 166
Table 2.1. Parameter values for simulations 38
Table 2.2. Implied parameters in cross-sectional analysis form black-scholes economy 39
Table 2.3. Single instrument hedging performances 43
Table 2.4. Double instrument hedging performances 45
Table 3.1. Summary statistics of implied and realized volatilities of KOSPI 200 index options 82
Table 3.2. The number of KOSPI 200 index options traded across investor types 83
Table 3.3. The correlations of net buying pressure between calls and puts 84
Table 3.4. Daily regression results for the impact of the net buying pressure on changes in the implied volatility of ATM options 85
Table 3.5. Daily regression results for the impact of the net buying pressure on changes in the implied volatility of OTM options 86
Table 3.6. Intraday regression results for the impact of the net buying pressure on changes in the implied volatility of ATM options 87
Table 3.7. Relation between net buying pressure and the KOSPI 200 index returns 88
Table 3.8. Intraday regression results for the impact of the net buying pressure on changes in the implied volatility of OTM options 89
Table 4.1. Information and liquidity effects in market dynamics 117
Table 4.2. Descriptive statistics 118
Table 4.3. The performances of trading strategies using order imbalances and returns as signals 119
Table 4.4. Granger causality 120
Table 4.5. The estimation results of the VAR equations in dynamics of returns and order imbalances 121
Table 4.6. Investor types and dynamics of returns and order imbalances 123
Table 5.1. Descriptive statistics of prices 149
Table 5.2. The determinants of the pricing error 151
Table 5.3. Performances of the investment strategies based on model prices 152
Figure 2.1. Implied volatility curves in black-scholes economy 47
Figure 2.2. Implied volatility curves in alternative economies 49
Figure 3.1. Impacts of the extreme - NBP on ATM options 90
Figure 3.2. Impacts of the extreme - NBP on OTM options 91
초록보기 더보기
This study investigates price anomalies by examining market dynamics and price formation process in derivative markets.
Firstly, we examine the effect of transaction costs on volatility smile phenomenon in option market, one of the famous financial anomalies. In addition, we investigate the effect of transaction costs on parameter estimation, and hedging of options. Using simulations, we document that transaction costs can generate the volatility smile phenomena even in the Black-Scholes economy. Particularly, volatility smile effect is very strong for short-term options and it disappears as the maturity of options becomes longer. Transaction costs cannot reject the true model falsely. All the parameter values that are supposed to be zero are not statistically significant even in the presence of transaction costs. In hedging, the Black-Scholes model performs better than any other model in any case. This may result from the parameter instability of the cross-sectional estimation method.
Secondly, we examine the price effect of information asymmetry and informed investors' preference on option market. To do this, we investigate the information impacts of net buying pressure on implied volatility and the intraday relation between index and option markets, using the intraday data of the KOSPI 200 index option market. We observe that the net buying pressure of call(put) options raises implied volatilities of calls(puts), while the net buying pressure of put(call) options lowers implied volatilities of calls(puts), Moreover, we document that the net buying pressure in the option market leads the stock market return. These results suggest that option traders in the KOSPI 200 index option market are directional traders informed by future index price movement rather than volatility traders informed by future index volatility, and also support the learning hypothesis rather than the limit of arbitrage hypothesis of Bollen and Whaley(2004) on the U.S. option markets.
Thirdly, we investigate the dynamics of returns and order imbalances across the KOSPI 200 cash, futures and option markets, to examine the effect of information and liquidity on market. Although we find some evidence suggesting the liquidity effect in return dynamics, the information effect is more dominant than the liquidity effect in these markets. In addition, we document that returns and order imbalances transmit information across markets. We observe that information seems to be transmitted more strongly from derivative markets to their underlying asset market than from the underlying asset market to their derivative markets.
Finally, we document that domestic institutional investors prefer stocks and futures, domestic individual investors prefer options, and foreign investors prefer stocks relative to other investor groups when they have new information. All investor groups seem to contribute to information transmission. Finally, we examine the underpricing phenomenon of the KTB futures. We examine whether this underpricing phenomenon is caused by using the wrong model to price the futures contracts. We document that the difference between the model price and the market price of KTB futures decreases substantially if the correct term-structure-based model is used to estimate the model price of KTB futures. In addition, even though the underpricing phenomenon can be exploited to generate some trading profits, the profits cannot be regarded as arbitrage profits. Thus, we believe that the underpricing phenomenon is illusory, and that much of it can be attributed to the wrong model being used in industry.
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