Firm swoops in to ensure volatility is a trade for another day By: CNBC.com News February 27, 2018 at 16:51 PM EST ProShare Capital Management said it was reducing leverage on two volatility-tracking funds Read More >> Related Stocks: Short VIX Short-Term -1X Futures ETF UBS AG VelocityShares VIX Short Volatility Hedged ETN linked to the S&P 500 VIX