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The Supply and Demand of S&P 500 Put Options

George Constantinides and Lei Lian

Critical Finance Review, 2021, vol. 10, issue 1, 1-20

Abstract: We model the supply of at-the-money (ATM) and out-of-the-money (OTM) S&P 500 index put options by risk-averse market makers (MMs) and their demand by risk-averse customers who hold the index and a risk free asset and buy puts as downside-risk protection. In equilibrium MMs are net sellers and customers are net buyers of index puts. Consistent with the data, the model-implied net buy of puts by customers is decreasing in the risk and put prices because the shift to the left of the supply curve dominates the shift to the right of the demand curve. The observed time series of the net buy of ATM and OTM puts are consistent with their model-implied counterparts.

Keywords: S&P 500 options; Net buy; Option supply and demand; Market makers (search for similar items in EconPapers)
JEL-codes: G11 G12 G23 (search for similar items in EconPapers)
Date: 2021
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Working Paper: The Supply and Demand of S&P 500 Put Options (2015) Downloads
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