US Stocks plummeted in their worst day since June 11, 2020 after key August inflation data ticked upward, surprising investors. 

The market is worried that hotter-than-expected inflation will prompt the Federal Reserve to raise interest rates more aggressively, inflicting serious damage to the US economy in the process.

The Dow was down 1276 points, or 3.9%.

The S&P 500 fell 4.3%.

The Nasdaq Composite tumbled 5.2%.