Behavioral explanations of trading volume and short-horizon price patterns: An investigation of seven Asia-Pacific markets

We investigate whether behavioral postulations offer any implicit explanation of the country-varying relation between trading volume and price pattern among short-horizon winners/losers in seven Pacific-Basin markets during the period 1990 to 2000. Our findings lend credence to the Lee and Swaminathan [Lee, C. and Swaminathan, B., 2000. Price momentum and trading volume, Journal of Finance 55, 2017-2069.] Momentum Life Cycle explanation that high (low) volume winners (losers) are more likely to experience price reversals, whereas high (low) volume losers (winners), price momentum, in the subsequent period. This observation is especially pronounced in Hong Kong. Other models such as those based on an information diffusion process and overconfidence in glamour stocks offer limited explanation for the relation. © 2007 Elsevier B.V. All rights reserved

Provincial co-movement in Chinese stock returns

Stock returns in China exhibit significant co-movement with provincial return indices after controlling for the industry effect, consistent with local co-movement findings in the United States. The magnitude of such co-movement increases with participation in trading by local investors. Trading activities of individual stocks also co-vary with provincial volume. The last two findings support the roles of investor behaviour in explaining the local return co-movement phenomenon.

Asymmetric information in the IPO aftermarket

Using the adverse selection component of the spread as a measure of asymmetric information, we investigate how asymmetric information evolves after firms go public. We find that the level of asymmetric information is lower immediately after the initial public offering (IPO) compared with its level after a period of seasoning. In addition, we test the hypothesis that the greater the underpricing of an IPO, the more information is produced in its aftermarket, and the lower the aggregate level of asymmetric information. Our results are consistent with the hypothesis and are robust after controlling for other factors. © 2005 Blackwell Publishing Ltd