Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper investigates the behavior of stock and option prices around block trades in stocks. The results indicate that for both uptick and downtick block trades the stock prices adjust within a fifteen minute period after the block trade. Moreover, for uptick blocks there is no evidence of any stock price reaction before the block trade. However, the adjustment of stock price for downtick blocks begins about fifteen minutes before the block trade. They also find that option price behavior differs considerably from stock price behavior. Specifically, the authors' results suggest that options exhibit abnormal price behavior starting thirty minutes before the block and ending one hour after the block. The pattern is more pronounced for downtick blocks and for put options. The authors interpret this abnormal price behavior of options before the block trade as consistent with intermarket frontrunning. Copyright 1992 by American Finance Association.