NEW YORK — Stocks slipped in morning trading on Wall Street Tuesday as trade tensions escalate again with China.

The S&P 500 fell 0.5%. The majority of stocks within the index gained ground, but big technology stocks with outsized values fell and offset gains elsewhere.

The Dow Jones Industrial Average slipped 76 points, or 0.2%, as of 10:41 a.m. Eastern time. The Nasdaq composite shed 0.9%.

The slide marks another sharp twist for markets over the last few days. Wall Street tumbled on Friday for its worst day since April and bounced back on Monday for its best day since May. The swings were prompted by shifting trade sentiment between the U.S. and China.

The latest dip follows China’s Commerce Ministry banning dealings by Chinese companies with five subsidiaries of South Korean shipbui

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