NEW YORK — Major stock indexes on Wall Street drifted to a mixed finish Friday, capping a rare bumpy week for the market. The Standard & Poor’s 500 ended essentially flat, down less than 0.1%, after wavering between tiny gains and losses most of the day. The benchmark index posted a loss for the week, its first after three straight weekly gains.

Wall Street's main indexes rose on Friday with Nasdaq outperforming after an upbeat forecast from Broadcom kept alive the euphoria around artificial intelligence and lifted chip stocks. Broadcom forecast quarterly revenue above Wall Street estimates and predicted booming demand for its custom AI chips in the next few years,