In this paper, we introduce the MSCI China A-shares index (MCASI) and analyze MCASI’s properties. From the perspective of index investment, we found that MCASI’s investor sentiments, both overnight sentiment and BW sentiment, provide significant predictability for future MCASI returns,...

We investigate how investor overconfidence and margin trades affect market efficiency around a market crash. We find that the price delay before a crash is about twice the price delay after a crash and that negative information travels slowly only when market sentiment is high because of...

We investigate the effect of investor overconfidence and margin trades on market efficiency around a market crash. We find that the price delay in a pre-crash period is about twice the price delay in a post-crash period. After a market crash, investors become more sensitive to market movements,...