This paper examines the hedging impact on the underlying stock market using a comprehensive dataset of covered warrants traded in the Taiwan Stock Exchange (TWSE). Since TWSE requires the warrant issuers to conduct dynamic hedging over the life of warrants, we can estimate the number of shares...

This study investigates the institutional investors who hold nonzero synchronous positions in both derivative and underlying stocks to increase contract payoffs. We show that the potential manipulators settle or offset their TAIEX futures and options and simultaneously trade the constituent...