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This paper documents the fact that in options markets, the (percentage) implied volatility bid-ask spread increases at … risk in an incomplete market with both directional and volatility risk. We extend this model to multi-periods and show that … the same phenomenon occurs there as well. Two new implications are generated: a volatility level effect and a volatility …
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This book is a collection of original papers by Robert Jarrow that contributed to significant advances in financial economics. Divided into three parts, Part I concerns option pricing theory and its foundations. The papers here deal with the famous Black-Scholes-Merton model, characterizations...
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