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 5.9 million shares, or a 1.3% increase week over week.   And on a percentage change basis, the ETF with the largest increase in inflows was the S&P 500 High Beta Portfolio (SPHB), which added 150,000 shares, for a whopping 150% increase in outstanding shares.