The 10 Most Massive SPDR ETFs On The Market by InsiderMonkey.comAugust 31, 2013April 15, 202001080 No. 1 SPDR S&P 500 ETF Trust (NYSEARCA:SPY) SPY data by YCharts Assets Under Management: $146.7 million The Index the ETF tracks: S&P 500 Index Average trading volume: $132.4 million Year-to-date return: 15.7% 1 2 3 4 5 6 7 8 9 10 11