The S&P 500 sank 1.6% for its second-worst day since Thanksgiving, though it’s still near its all-time high set late last month. The Dow Jones Industrial Average dropped 669 points, or 1.3%, and the Nasdaq composite fell 2%.

AppLovin lost nearly a fifth of its value and tumbled 19.7%, even though it reported a stronger profit for the latest quarter than analysts expected. Like other software companies, it’s come under pressure from worries that AI may undercut its business while fundamentally changing how people use the internet.

AppLovin CEO Adam Foroughi pushed back on the concerns, saying in a conference call with analysts that indicators show his company is doing well. “There’s a real disconnect between market sentiment and the reality of our business,” he said.

Its stock nevertheless widened its loss for the young year so far, which came into the day at 32.2%.

Cisco Systems dropped 12.3% despite likewise topping analysts’ expectations for profit and revenue last quarter. The tech giant indicated that it may make less profit off each $1 of revenue during the current quarter than it did in the past quarter.