Among the best-performing non-leveraged ETFs of Friday, the iPath Series B S&P 500 VIX Short Term Futures ETN (NYSEArca: VXX) increased 6.5% and the ProShares VIX Short-Term Futures ETF (NYSEArca: VIXY) advanced 6.5%. The CBOE Volatility Index and VIX-related exchange traded funds surged on Tuesday as U.S. equities retreated in the face of bond yields hitting a two-year high. “The hot inflation prints have spooked the market that the Fed is going to move and so we are seeing this rise in yields,” Mona Mahajan, senior investment strategist at Edward Jones, told Reuters.