Alex Roepers' long/short Cambrian strategy at New York-based Atlantic Investment Management gained a hefty 7.8% in April, leaving the fund up 5.9% on the year for its Class-A shares. But with the surge in equities that swept markets in April, being hedged on the short side was apparently laden with challenges, as highlighted by the fact the long-only version of Cambrian climbed by a loftier 11% during the same...