FYI: If you are a long-time reader of our site, you are probably familiar with the term all or nothing day. For those that aren’t, we define an all or nothing day as one where the net number of advancing issues in the S&P 500 for a given day is either above +400 or below -400. Throughout most of the year, all or nothing days in the S&P 500 were few and far between. For example, in the 159 trading days from the start of the year through 8/19, there were a total of 13 all or nothing days in the S&P 500. Since then, there have been 11 in the span of just 15 trading days!
Regards,
Ted
https://www.bespokepremium.com/think-big-blog/another-all-or-nothing-day/
