iPath S&P 500 VIX Short Term Futures ETN ( VXX) -2.3% The fear index is taking a hit, revisiting its 2012 lows. In response to this downturn, futures-tracking ETNs like VXX and the iPath S&P 500 VIX Mid-Term Futures ETN ( VXZ) are also in negative territory. Given their rough starts to the year, it will be interesting to see where VIX-related products go in the weeks ahead. All prices are as of 2:13 PM EST. Written by Don Dion in Williamstown, Mass.