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Journal of Financial and Quantitative Analysis 2026

Betting Against the Crowd: Option Trading and Market Risk Premium

Jie Cao1; Gang Li2; Xintong Zhan3; Guofu Zhou4

1 Hong Kong Polytechnic University · 2 Chinese University of Hong Kong · 3 Fudan University · 4 Washington University in St. Louis

open access

Abstract

We study how equity option trading affects the market risk premium. We find that a measure of aggregate call order imbalance (ACIB), defined as the cross-sectional average of the difference between open-buy and open-sell volume, negatively forecasts future stock market returns significantly from days to months. Moreover, ACIB represents an option-based investor sentiment measure that accounts for excess option buying or selling, and is highly correlated with the stock investor sentiment. Our findings shed new insights on the distinctions for call and put option trading, index and equity option trading, and cross-sectional and time-series predictions.

DOI
10.1017/s0022109026102889
Pages
1-49
Language
en
Sources
crossref openalex

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