U.S. stock indexes are slumping further from their records Thursday as Wall Street’s frenzy around artificial-intelligence technology weakens some more. The S&P 500 was down 1% in late trading and on ...

The U.S. Department of Justice is investigating Medicare Advantage billing practices at UnitedHealth Group, a development ...

U.S. stock indexes are drifting, but the modest moves mask sharp swings under the market’s surface as Wall Street’s frenzy ...