Trading Activity in Options and Stock Around Price‐Sensitive News Announcements

Khelifa Mazouz, Yuliang Wu and Shuxing Yin

Journal of Futures Markets, 2015, vol. 35, issue 12, 1173-1194

Abstract: This study investigates the trading activity in options and stock markets around informed events with extreme daily stock price movements. We find that informed agents are more likely to trade options prior to negative news and stocks ahead of positive news. We also show that optioned stocks overreact to the arrival of negative news, but react efficiently to positive news. However, the overreaction patterns are unique to the subsample of stocks with the lowest pre‐event abnormal option/stock volume ratio (O/S). This finding suggests that the incremental benefit of option listing is related to the level of option trading activity, over and beyond the presence of an options market on the firm's stock. Finally, we find that the pre‐event abnormal O/S is a better predictor of stock price patterns following a negative shock than is the pre‐event O/S, implying that the former may contain more information about the future value of stocks than the latter. © 2014 Wiley Periodicals, Inc. Jrl Fut Mark 35:1173–1194, 2015

Date: 2015
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