The Wall Street Journal reports that Greenlight Capital, run by David Einhorn, had a small loss in November, according to the investment results of Greenlight Capital Re (GLRE), a reinsurer that invests its premiums with the hedge fund manager.

Einhorn, who runs hedge-fund firm Greenlight Capital, is also chairman of Greenlight Capital Re, which reinsures property and casualty risks.

While most reinsurers plow premiums into bonds and other credit-related securities, Greenlight Capital Re invests almost all its premiums with Einhorn, who specializes in long/short equity trading.