Stocks dropped sharply Tuesday, with the Nasdaq Composite COMP, -3.95% posting its lowest finish since late 2020 ahead of earnings from tech giants Microsoft Corp. MSFT, -3.74% and Google parent Alphabet Inc. GOOG, -3.04% . The Dow Jones Industrial Average DJIA, -2.38% lost around 809 points, or 2.4%, to close near 33,240, according to preliminary figures, while the S&P 500 SPX, -2.81% shed around 121 points, or 2.8%, to end near 4,175.