 The CBOE Volatility Index and VIX-related exchange traded funds climbed Thursday as investors dumped risk assets on uncertainty over the Federal Reserves reaction to accelerating headline inflationary pressures. Among the best-performing non-leveraged ETFs of Thursday, the iPath Series B SP 500 VIX Short Term Futures ETN NYSEArca: VXX increased 8.6, and the ProShares VIX Short-Term Futures . 