One Security, Two Prices: Evidence on Stock Market Bubbles from the Shanghai-Hong Kong Stock Connect Program Shantaram Hegde Department of Finance 2100 Hillside Road University of Connecticut Storrs, CT 06269-1041 E-mail:
[email protected] Jin Peng* Department of Finance 2100 Hillside Road University of Connecticut Storrs, CT 06269-1041 E-mail:
[email protected] 6/27/17 * We thank Kose John, Joseph Golec, Assaf Eisdorfer, Paul Borochin, John Clapp and seminar participants at Univer- sity of Connecticut for valuable comments and suggestions. All remaining errors are our own. Address correspond- ence to Jin Peng, School of Business, University of Connecticut, 2100 Hillside Road, BUSN 406, Storrs, CT 06269- 1041, or e-mail:
[email protected]. One Security, Two Prices: Evidence on Stock Market Bubbles from the Shanghai-Hong Kong Stock Connect Program Abstract In this paper, a unique data sample from cross-listed stocks in two segmented but partially con- nected markets allows us to examine the implications of the bubble theories while controlling for fundamentals. We study price, volume, volatility and liquidity changes surrounding the launch of the Stock Connect program on 17 November 2014, which links trading in A shares listed on the Shanghai Stock Exchange (SSE) to their ‘twin’ (cross-listed) H shares traded on the Hong Kong Stock Exchange (SEHK). The price and price discovery gaps of the A-H shares should be larger after the Stock Connect if the speculative trading in Shanghai market explains most of the price differences. On the other hand, there should be a price convergence effect after the Stock Connect if the efficient market theories explain a fraction of the price disparity since information asym- metry and limits of arbitrage are reduced.