Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Mandatory disclosure of hedge fund portfolios has been a hotly debated topic. This article studies asset returns of ‘confidential holdings’ (confidentiality treatment [CT]) or those assets that were not voluntarily disclosed by US-based hedge funds in their original 13F filings to the Securities and Exchange Commission. After analysing returns from 1999 to 2013, we find that in aggregate, the CT position size, ownership share and returns are statistically different to non-CT positions. We provide a mechanism for regulators and investors to rank fund managers based on what they hide in positions.