Turning today to week-over-week shares outstanding changes among the universe of ETFs covered at ETF Channel, the largest outflow was seen in the SPDR S&P 500 (SPY), which shed 25,450,000 shares, or a 3.2% decrease week over week. And on a percentage change basis, the ETF with the largest outflow was the Daily Retail Bull 3x Shares (RETL), which lost 100,000 of its shares, for a whopping 50.0% decline in outstanding shares.