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 MSCI Japan Index Fund (EWJ), which added 45.6 million shares, or a 6.5% increase week over week.   And on a percentage change basis, the ETF with the largest increase in inflows was the First Trust Mega Cap AlphaDEX Fund (FMK), which added 150,000 shares, for a whopping 150.0% increase in outstanding shares.