Comparing units outstanding versus one week ago at the coverage universe of ETFs at ETF Channel, the biggest inflow was seen in the iShares Gold Trust, which added 16,200,000 units, or a 1.8% increase week over week.

And on a percentage change basis, the ETF with the biggest increase in inflows was the PowerShares Dynamic Oil & Gas Services Portfolio, which added 850,000 units, for a 28.8% increase in outstanding units. Among the largest underlying components of PXJ, in morning trading today National Oilwell Varco is up about 3.1%, and Core Laboratories is up by about 2.7%.

For MarketNewsVideo.com, I'm Sayoko Murase