Exchange-Traded Fund (ETF) (SPY,IWM,DIA,QQQ,XLE,XLF,IYR,OIH,BBH,USO,GLD,SLV,UNG)
A security that tracks an index, a commodity or a basket of assets like an index fund, but trades like a stock on an exchange. ... DEFINITION of 'Exchange-Traded Fund (ETF)' An ETF, or exchange traded fund, is a marketable security that tracks an index, a...