While Wall Street was on course to register a weekly gain, August was expected to show its biggest monthly decline since May after escalations in U.S.-China trade tensions and the inversion of a key part of the U.S. yield curve which is often a recessionary signal. Wall Street markets will be closed on Monday for the U.S. Labor Day holiday. "Trying to make a very large move in the last day of the month when Labor day is following is not the best idea," said Pande.

source https://finance.yahoo.com/news/us-stocks-wall-st-slips-192042220.html?.tsrc=rss