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Previous studies have found a causality relationship existing between options and underling securities by applying data in U.S. markets. To Examine whether a similar relationship existing in Taiwan becomes the major purpose of this research . Via the use of Granger Causality test ,this paper has evidenced that the timing of warrants issuance enjoys an impact on the causality relationship between warrants and underlying securities. Besides, the characteristics of the underlying securities, be it a single security or a portfolio composed of many securities, will also influence the causality. The early holders of warrants are mainly institutional investors because of the information asymmetry . In other words, the investor structure is related to the leading/lagging relationship between warrants and underlying securities.
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