Investor clientele and intraday patterns in the cross section of stock returns
研究了美国以外三个市场（英国、中国、巴西）的日内动量模式，发现中国A股（散户主导）的模式弱于B股和H股（外资机构主导），且纳入MSCI指数后模式增强。
Abstract This paper examines the existence of a well documented (Heston et al. in J Finance 65:1369–1407) (hereafter HKS 2010) intraday momentum pattern in the cross section of stock returns for three previously un-examined markets outside the US—UK, China and Brazil. While the stocks in UK and Brazil exhibit the pattern, the evidence from China is lacklustre. We utlitlize the presence of dual listed A-shares (dominated by domestic retail investors) and their B- and H-share counterparts (dominated by foreign institutional investors) of the same firms which provide a natural experiment setting to analyse the impact of investor clientele on the proliferation of HKS (2010) pattern. Our findings indicate that pattern is much weaker in A-shares (owned mostly by domestic retail investors) as compared to their B- and H-share counterparts. As a further robustness test we examine the impact of an exogenous shock that leads to an increase in institutional ownership namely the partial index inclusion of A-shares in the Morgan Stanley Capital International (MSCI) Emerging Markets Index. Our findings indicate an increasing level of the manifestation of the intraday pattern upon inclusion of A-shares to the MSCI.