By Matthew Goldstein

These days, all anyone wants to talk about with David Einhorn is his tentative $200 million investment in the New York Mets. But baseball may not be the hedge fund manager’s only interest in Queens–the New York City borough where the Mets play their home games.

A person familiar with the hedge fund industry says a secured facility in Queens is where Einhorn’s Greenlight Capital stores some of the gold bullion it has invested in. An Einhorn spokesman declined to comment on the speculation about the location of the hedge fund’s so-called physical gold.

Greenlight began investing in gold bars in its main flagship fund in 2009. Last year, Einhorn launched a dedicated gold-only fund for investors wanting a more concentrated exposure to the precious metal. As of March 30, this dedicated gold fund had raised about $556 million from 130 investors. In all, Greenlight now manages about $7.8 billion.

Recently, Greenlight, in a regulatory filing, disclosed that some of the bullion owned by its gold-only fund is held in trust with  HSBC, which maintains a gold vault in Manhattan under its Fifth Avenue office tower. In the filing with the New York Secretary of State, it was disclosed that some of Greenlight’s gold buillion was pledged as collateral for a financing deal with Goldman Sachs Bank. The UCC Financing Statement did not say how much money the Greenlight fund was borrowing from the Goldman Sachs Group banking subsidiary.

In its first year of existence, the Greenlight’s gold-only fund proved to be quite a success–posting a roughly 33 percent gain. Einhorn can only hope his investment in the financially-strapped Mets can produce anything close to that kind of a return.