Looking today at week-over-week shares outstanding changes among the universe of ETFs covered at ETF Channel, the largest inflow was seen in the iShares Gold Trust (IAU), which added 4.9 million shares, or a 1.0% increase week over week.   And on a percentage change basis, the ETF with the largest increase in inflows was the iShares S&P Target Date 2015 Index Fund (TZE), which added 150,000 shares, for a whopping 50.0% increase in outstanding shares.