A "gold vault" refers to a secure storage space where large amounts of gold are kept. It is like a special room or building designed to safeguard gold, similar to a safe or a bank vault. Full definition
As of 12/7/15, the largest gold ETF, GLD (State Street SPDRS), was backed by 638.4 t, or 56.8 percent of non-official gold vaulted in London. (tocqueville.com)
The New York Fed plays key roles in the oversight and management of U.S. payment systems and money markets, and it houses the nation's main gold vault. (thestreet.com)
In 2011 an estimated 9000 t was located in Bank of England or commercial gold vaults. (tocqueville.com)