Abstract

We document empirical support for the 'house money' effect proposed by Thaler and Johnson (1990). Market makers for Taiwan' TAIEX index options tend to take above-average risks in afternoon trading after above-average morning gains. The fraction of market makers with better-than-average morning performance influences market-level liquidity and volatility in the afternoon trading. Our findings confirm that prior outcome influences subsequent risk-taking and emphasize that how investors frame previous outcomes influences their subsequent attitude toward risks.

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