Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Using market-wide data from the Brazilian stock lending market at the deal level, we find strong evidence of short-selling skill for institutions and individuals. Skilled short-sellers present out-of-sample performance persistence. Exploring the granularity of our dataset, we find that skilled short-sellers do not display the disposition effect, are more likely to pick value, liquid, high-volatility, and losing stocks, and to initiate a short position before earnings announcements and around sell recommendations.