AMEX:VXX IPATH S&P 500 VIX SHORT-TERM FUTURES ETN
VIX have gone into backwardation opposed to their regular cantango (i.e. for VIX are now cheaper than current VIX levels), causing VXX to trend higher than VIX . Very strong demand for VXX has caused backwardation and is usually triggered when the market is extremely volatile. Just something to be aware of and wouldn't be surprised if starts to calm down soon in near future.