 New evidence on the implied-realized volatility relationBent Jesper Christensen and Charlotte Hansen The European Journal of Finance, 2002, vol. 8, issue 2, 187-205 Abstract: We consider the relation between the volatility implied in an option's price and the subsequently realized volatility. Earlier studies on stock index options have found biases and inefficiencies in implied volatility as a forecast of future volatility. More recently, Christensen and Prabhala find that implied volatility in at-the-money one-month OEX call options on the S&P 100 index in fact is an unbiased and efficient forecast of ex-post realized index volatility after the 1987 stock market crash. In this paper, the robustness of the unbiasedness and efficiency result is extended to a more recent period covering April 1993 to February 1997. As a new contribution, implied volatility is constructed as a trade weighted average of implied volatilities from both in-the-money and out-of-the-money options and both puts and calls. We run a horse race between implied call, implied put, and historical return volatility. Several robustness checks, including a new simultaneous equation approach, underscore our conclusion, that implied volatility is an efficient forecast of realized return volatility. Date: 2002 Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:taf:eurjfi:v:8:y:2002:i:2:p:187-205 Ordering information: This journal article can be ordered from DOI: 10.1080/13518470110071209 Access Statistics for this article The European Journal of Finance is currently edited by Chris Adcock More articles in The European Journal of Finance from Taylor & Francis Journals |
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