Among the best-performing non-leveraged ETFs of Thursday, the iPath Series B S&P 500 VIX Short Term Futures ETN (NYSEArca: VXX) increased 8.6%, and the ProShares VIX Short-Term Futures ETF (NYSEArca: VIXY) advanced 8.4%. The CBOE Volatility Index and VIX-related exchange traded funds climbed Thursday as investors dumped risk assets on uncertainty over the Federal Reserve's reaction to accelerating headline inflationary pressures. "I expect that we'll see a return of the volatility that was prevalent for most of the month of January in the wake of this report," Brian Price, head of investment management for Commonwealth Financial Network, told Reuters.