The VIX has hovered around 12 since mid-July. That level usually signals quiescence, while a reading of 20 or above indicates that investors are bracing for moves sharply south
The rise in the VIX comes as the Dow Jones Industrial Average DJIA, +0.27% and the S&P 500 index SPX, +0.37% and the Nasdaq Composite Index COMP, +0.78% relinquished all of the sharp gains racked up 24 hours ago. Monday’s rally followed another tumble on Friday that saw the VIX jump 40%—the largest daily move since the U.K.’s vote to secede from the European Union on June 23.
On Wednesday, the VIX was wavering as stocks tried to stage a tepid rebound after Tuesday’s big losses.
Three straight days of moves of at least 1% for stocks, marks the first time since 1963 that the S&P 500 followed an extended period of calm—43 days—with a trio of such choppy trading days, according to Dow Jones data. That was the two-day period before and immediately following the assassination of President John F. Kennedy in November 1963, Dow Jones data show.