May. 13 at 10:34 AM
Monday
$SPX and
$VIX were up.
Since 2016, Monday is the most probable day for the outcome. VIX resets from lowered option bids the prior Friday, and auto-hedging programs for week are implemented Monday. Monday's VIX has limited insight for risk appetite, its a mkt operation
Friday, naturally has the opposite outcome. The greatest frequency for both SPX and VIX to fall on the same day is Friday, because those weekly hedging programs expire/roll-off.
$UVXY $QQQ $UVIX