More and more non-Taiwan registered firms has cross-listed their shares as TDR (Taiwan Depository Receipt) in recent years, especially after 2009. This paper discusses the cross-listing effects of TDR on their home stock price as a basis of further research on motivations of their listing. It’s been widely discussed that the stock price of some TDR-listing firms increased dramatically due to speculation by insiders. Our event study , with available data as for Mar 11, 2011, shows statistical evidence with sign test of nonparametric method, and therefore provides possible support to the corporate benefits of cross-listing in Taiwan as that of ADR cross-listing, or insider speculation. The weak performance of share price of TDR-listing firms after listing event make us tend to believe the price increase before listing is possibly the result of market speculation.