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Journal cover: International Journal of Managerial Finance

International Journal of Managerial Finance

ISSN: 1743-9132

Online from: 2005

Subject Area: Accounting and Finance

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The lead-lag relationship between stock index options and the stock index market: Model, moneyness, and news


Document Information:
Title:The lead-lag relationship between stock index options and the stock index market: Model, moneyness, and news
Author(s):Sol Kim, (School of Business, Hankuk University of Foreign Studies, Seoul, South Korea), In Joon Kim, (School of Business, Yonsei University, Seoul, South Korea), Seung Oh Nam, (Department of Financial Management, Soonchunhyang University, Asan-si, South Korea)
Citation:Sol Kim, In Joon Kim, Seung Oh Nam, (2009) "The lead-lag relationship between stock index options and the stock index market: Model, moneyness, and news", International Journal of Managerial Finance, Vol. 5 Iss: 3, pp.311 - 332
Keywords:Options markets, Stochastic processes, Stock markets, Stock prices
Article type:Research paper
DOI:10.1108/17439130910969738 (Permanent URL)
Publisher:Emerald Group Publishing Limited
Acknowledgements:This work was supported by SoonChunHyang University Research Fund of 2009.
Abstract:

Purpose – The purpose of this paper is to examine the price discovery role of the Korea Composite Stock Price Index 200 (KOSPI 200) stock index options market in contrast to other developed options markets.

Design/methodology/approach – The price discovery roles of the stock and options markets using the error-correction model derived from the co-integration relationship are examined. Various analyses are conducted. First, Heston's stochastic volatility option pricing model is employed to confirm its usefulness, and compare the results with the Black and Scholes (BS) model. Second, whether the out of the money (OTM) options purchased by individual investors have a stronger price discovery role than options with other moneyness is examined. Finally, whether options have a stronger price discovery role in bullish or bearish markets than in normal markets is tested.

Findings – It is found that stock index prices lead implied index prices estimated from option prices using both BS and Heston models. In regards to the OTM options, the lead-effect of real stock index to implied index prices holds. Also it is shown that there is a weak rise in the lead effect of the options to the stock index, but the lead effect of stock index market rules over that of the options market.

Originality/value – The paper examines the price discovery role of the KOSPI 200 stock index options market in contrast to other developed options markets and the results indicate that the consensus on the Korean financial markets may be incorrect.



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