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 Oil Services ETF (OIH), which added 8,000,000 shares, or a 33.7% increase week over week. Among the largest underlying components of OIH, in morning trading today Schlumberger Ltd (SLB) is up about 0.8%, and National Oilwell Varco Incorporated (NOV) is up by about 1.8%.