The stock market experienced significant negative movements with several key indices and stocks showing losses. S&P 500 Equal-weight index dropped 1.5%, outpacing the cap-weighted index's 0.75% decline. The net A/D line for the S&P 500 was -394. Small-caps underperformed large-caps by almost 200 basis points. Imbalances of $5.0B favored the buy side for NYSE S&P.