October's 10 worst ETFs

ProShares VIX Mid-Term Futures ETF (NYSEArca: VIXM)

October returns: -3.5%

Comment: Volatility spiked in the days before the U.S. debt default deadline, but a last minute proposal to raise the debt ceiling helped clear up uncertainty, pressuring CBOE Volatility Index, or “VIX,” related ETFs. VIXM holds mid-term VIX futures contracts.