媒体对股票的报道是否影响共同基金的交易和表现？

2015/04/16

We study the relation between mutual fund trades and mass media coverage of stocks. We find that funds exhibit persistent differences in their propensity to buy media-covered stocks. Moreover, this propensity is negatively related to their future performance. Funds in the highest propensity decile underperform funds in the lowest propensity decile by 1.1% to 2.8% per year. These results do not extend to fund sells, likely because of funds’ inability to sell short. Overall,the findings suggest that professional investors are subject to limited attention.