The Largest Index ETFs On The Market: SPDR S&P 500 ETF (SPY), PowerShares QQQ (ETF) (QQQ) & More by InsiderMonkey.comAugust 22, 2013April 19, 202001146 No. 1 SPDR S&P 500 ETF Trust (NYSEARCA:SPY) SPY data by YCharts Assets Under Management: $150.4 billion Index the ETF Tracks: S&P 500 Index YTD Return: 16% Daily average trading volume: $132.5 million 1 2 3 4 5 6 7 8 9 10