US STOCKS-Wall St flat amid Sino-U.S. tensions, economic uncertainty By: Reuters: Company News May 22, 2020 at 13:36 PM EDT * Dow off 0.41%, S&P down 0.11%, Nasdaq up 0.16% (Adds details, comments, updates prices) Read More >> Related Stocks: Alibaba Group Holding Ltd Best Buy Home Depot KKR & Company LP Pdd Holdings Inc Splunk Inc Wal-Mart Stores, Inc.