NEW YORK (AP) — A suddenly stormy month on the stock market came to a quiet end on Tuesday. Major indexes drifted to a slight loss, leaving the Standard & Poor’s 500 down 1.6 percent for September, its third monthly drop this year.

The market spent Tuesday wavering between minor gains and losses, but there were big moves beneath the surface. Crude oil prices plunged, dragging down Chevron and other oil and gas companies. Ford Motor fell after cutting its profit forecast, while eBay jumped after announcing plans to spin off PayPal.