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Options market makers׳ hedging and informed trading: Theory and evidence

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  • Huh, Sahn-Wook
  • Lin, Hao
  • Mello, Antonio S.

Abstract

We develop a model to analyze the effects of hedging activities by options market makers (OMMs) facing informed trading. The model suggests that OMMs׳ hedging activities motivated by adverse-selection risk lead to wider spreads in both stock and options markets. The hedging effect on spreads is more pronounced in the options market than in the stock market. The effect is larger when the OMMs hedge with the underlying asset than with other options. In addition, hedging activities by the OMMs significantly alter the trading strategies of informed traders. Our empirical tests provide evidence consistent with the key implication of our model.

Suggested Citation

  • Huh, Sahn-Wook & Lin, Hao & Mello, Antonio S., 2015. "Options market makers׳ hedging and informed trading: Theory and evidence," Journal of Financial Markets, Elsevier, vol. 23(C), pages 26-58.
    • Handle: RePEc:eee:finmar:v:23:y:2015:i:c:p:26-58
    DOI: 10.1016/j.finmar.2015.01.001
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    Cited by:

    1. Ersan, Oguz & Alıcı, Aslı, 2016. "An unbiased computation methodology for estimating the probability of informed trading (PIN)," Journal of International Financial Markets, Institutions and Money, Elsevier, vol. 43(C), pages 74-94.
    2. Oliver Entrop & Georg Fischer, 2020. "Hedging costs and joint determinants of premiums and spreads in structured financial products," Journal of Futures Markets, John Wiley & Sons, Ltd., vol. 40(7), pages 1049-1071, July.
    3. Miriam Marra, 2017. "Explaining co-movements between equity and CDS bid-ask spreads," Review of Quantitative Finance and Accounting, Springer, vol. 49(3), pages 811-853, October.
    4. Schertler, Andrea, 2021. "Listing of classical options and the pricing of discount certificates," Journal of Banking & Finance, Elsevier, vol. 123(C).
    5. Li, Wei-Xuan & French, Joseph J. & Chen, Clara Chia-Sheng, 2017. "Informed trading in S&P index options? Evidence from the 2008 financial crisis," Journal of Empirical Finance, Elsevier, vol. 42(C), pages 40-65.
    6. Entrop, Oliver & Fischer, Georg, 2019. "Hedging costs and joint determinants of premiums and spreads in structured financial products," Passauer Diskussionspapiere, Betriebswirtschaftliche Reihe B-34-19, University of Passau, Faculty of Business and Economics.

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    More about this item

    Keywords

    Options market making; Hedging; Informed trading; Adverse-selection risk; Bid–ask spreads; Daily conditional probability of informed trading;
    All these keywords.

    JEL classification:

    • G10 - Financial Economics - - General Financial Markets - - - General (includes Measurement and Data)
    • G14 - Financial Economics - - General Financial Markets - - - Information and Market Efficiency; Event Studies; Insider Trading
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design

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