S&P closes marginally lower as new Covid-19 cases surge; Dow falls 177 pts

The S&P 500 closed lower on Wednesday as news of spiking pandemic data and the prospect of a new round of economic lockdowns dampened investor optimism over signs of economic recovery.

The S&P 500 and the Dow reversed earlier gains and snapped a three-day winning streak. Tech shares led the Nasdaq into the black.

Worries over a resurgence in the pandemic's spread persist, as new coronavirus cases hit a record level in Oklahoma just days before President Donald Trump's expected campaign rally in Tulsa.

The numbers of new cases are rising sharply in about six US states, according to a Reuters analysis, and