Recent academic studies document that open market share repurchase announcements in the United States generate significantly lower returns than those reported in earlier studies. We find that the lower announcement return is associated with an increasing number of subsequent announcements in the...

Recent academic studies document that open market share repurchase announcement period returns are much lower than those reported in early studies. This study finds that the lower announcement returns are attributed to repeat announcements that dominate the sample in the recent period. The...

Since the adoption of the SEC's Rule 10b-21 in 1988, many researchers have been concerned over the effectiveness of short sales constraints in preventing manipulative trading in the derivatives market. We analyze whether options can be used as synthetic short sale instruments to manipulate stock...