US Stock Market Today (Dec. 18, 2025, 4:18 p.m. ET): S&P 500 and Nasdaq Rebound as Softer Inflation and Micron Spark a Tech-Led Rally
NEW YORK — U.S. stocks finished higher Thursday after a session that flipped the script on this week’s risk-off mood, with cooling inflation data and a powerful earnings catalyst in semiconductors helping investors lean back into growth. As of 4:18 p.m. ET—minutes after the closing bell—the S&P 500 ended up 0.78% at 6,773.91, the Nasdaq Composite rose 1.37% to 23,004.92,…