The market's worst day of 2022 was September 13th when the Bureau of Labor's Consumer Price Index came in higher then expected. A month later the next CPI release was a similar surprise however the market's reaction to that news was much different.
Former Goldman Sachs CEO Lloyd Blankfein remarked: "This is one of those trading days where if you really had the news in advance, you REALLY would have lost a lot of money."