In this letter, I exploit the high fraction of retail investors in the early years of the Bitcoin and the introduction of margin trading and short selling by the Bitcoin Exchange Kraken to apply a difference-in-differences approach with four other comparable Bitcoin exchanges to infer causality....

We aim to answer if superior performance by short sellers’ is generated by processing public information rather than by exploiting private information. To achieve this, we analyze if short sellers with healthcare expertise outperform in short selling of non-healthcare stocks compared to those...