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The impact of net buying pressure on index options prices

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  • Doojin Ryu
  • Doowon Ryu
  • Heejin Yang

Abstract

This study examines whether the demand for options, as measured by the net buying pressure of index options, explains the implied volatility structure created by options prices. We decompose the buying pressure into the direction‐motivated (i.e., delta‐informed) and the volatility‐motivated (i.e., vega‐informed) demand for options. After controlling for options traders' hedging demand, we find that both delta‐ and vega‐informed trading play significant roles in explaining changes in implied volatility. Foreign institutions are more directionally informed in index options trading than their domestic counterparts are. Domestic investors effectively implement volatility trading using put options.

Suggested Citation

  • Doojin Ryu & Doowon Ryu & Heejin Yang, 2021. "The impact of net buying pressure on index options prices," Journal of Futures Markets, John Wiley & Sons, Ltd., vol. 41(1), pages 27-45, January.
    • Handle: RePEc:wly:jfutmk:v:41:y:2021:i:1:p:27-45
    DOI: 10.1002/fut.22158
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    7. Lee, Jaeram & Ryu, Doojin & Yang, Heejin, 2021. "Does vega-neutral options trading contain information?," Journal of Empirical Finance, Elsevier, vol. 62(C), pages 294-314.
    8. Ryu, Doojin & Ryu, Doowon & Yang, Heejin, 2023. "Whose sentiment explains implied volatility change and smile?," Finance Research Letters, Elsevier, vol. 55(PA).
    9. Doojin Ryu & Jinyoung Yu, 2021. "Informed options trading around holidays," Journal of Futures Markets, John Wiley & Sons, Ltd., vol. 41(5), pages 658-685, May.
    10. Carol Alexander & Jun Deng & Jianfen Feng & Huning Wan, 2021. "Net Buying Pressure and the Information in Bitcoin Option Trades," Papers 2109.02776, arXiv.org, revised Mar 2022.
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    14. Joonhyuk Song & Doojin Ryu & Jinyoung Yu, 2023. "Changes in the options contract size and arbitrage opportunities," Journal of Futures Markets, John Wiley & Sons, Ltd., vol. 43(1), pages 122-137, January.
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