Wall Street's big three-day rally is running out of steam, and U.S. stocks are drifting in mixed trading Friday as they near the end of another roller-coaster week. The S&P 500 was 0.4% higher in afternoon trading,

The bounce in U.S. stocks gained momentum on Wednesday as the Trump administration turned down the heat on its trade war with China that has so rattled markets, while the president distanced himself from his own calls for the immediate termination of Federal Reserve chair Jerome Powell.

U.S. stocks rallied further as better-than-expected profits for U.S. companies piled up, though CEOs say they’re unsure whether it will last because of uncertainty created by President Donald Trump’s trade war.