ETF Channel Staff - Tuesday, August 30, 12:25 PM

Launch related slideshow:
The 10 Best ETF Performers »

Looking at units outstanding versus one week prior within the universe of ETFs covered at ETF Channel, the biggest outflow was seen in the ProShares Ultra VIX Short-Term Futures ETF, where 11,450,000 units were destroyed, or a 7.9% decrease week over week.

And on a percentage change basis, the ETF with the biggest outflow was the ProShares UltraShort Health Care, which lost 75,000 of its units, representing a 32.5% decline in outstanding units compared to the week prior.