This study employs event study to show that, on average, exchange switching in Taiwan stock market from 1997 to 2000 is a negative event for stockholders. Stocks involved in exchange switching experience negative abcdrmal returns before and after switching. And, in general, liquidity deteriorates after exchange switching. Therefore, TSEC is not absolutely better than OTC from the view of liquidity-providing. Several conclusions are derived in this paper: 1. On average, exchange switching in Taiwan does not create value for stockholders. 2. In general, liquidity deteriorates after switching according to the evidences found in this study with multiple liquidity measures. 3. Liquidity indeed has multiple facets. 4. TSEC is not exactly better than OTC for raising in terms of function of liquidity providing.