SPDR Gold Trust is one of the trust funds (ETF) SPDR operated by State Street Global Advisors - a division of State Street Corporation, the world's second largest asset management group. SPDR Gold Trust is the sixth largest trust fund in the United States and the largest gold trust fund in the world. With huge gold holdings, each move of SPDR Gold Trust has strongly influenced the market. SPDR Gold Trust - Considered Big Boy in the gold market. Seeing the trading volume of SPDR every day is almost an indispensable task, because it is possible to predict whether the cash flow is pouring in or out of gold, thereby predicting the direction of the gold price.