On Friday, the CBOE VIX surged, as U.S. stocks struggled to gain ground.

The Chicago Board Options Exchange Volatility Index, commonly known as the VIX, reached an intraday high of 22.46 on a scale of 1-100, where 20 represents the historic average. It would eventually settle up 7.5% at 21.46.

In stocks, the large-cap S&P 500 Index (SPY) declined 0.1% on Monday.

iPath S&P 500 VIX Short Term Futures ETN: (NYSEARCA: VXX) Designed to offer exposure to the S&P 500 VIX Short Term Futures Index Total Return. The Index utilises CBOE Volatility Index futures by investing in first and second-month VIX futures contracts. VXX advanced 1.1%.

ProShares Short VIX Short-Term Futures (SVXY) to track the S&P 500 VIX Short Term Futures Index’s inverse daily performance. SVXY records a small decline of 0.6%.

ProShares UltraShort Term VIX Futures: (UVXY) UVXY delivers 1.5X (leveraged) returns of the day’s moves in the S&P 500 VIX Short Term Futures Index. This index includes the two front months from the futures contract. UVX advanced 1.5%.