SPY ▼ -0.3% - State Street SPDR S&P 500 ETF Trust $SPY August officially closes with the lowest monthly volume since Sept 2004. SPY closed August with its lowest monthly volume since September 2004, a sign of thinned trading interest that may have contributed to the ETF's 0.3% decline today as the market headed into the final stretch of summer. 31-AUG-2026 05:02 PM ET