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U.S. Indexes Closed Up Thursday; Rivian Automotive Topped Leaders

Dec 18, 2025 16:10:00 -0500 | #Markets

U.S. stock indexes climbed Thursday as the rose 1.38%. Meanwhile, the rose 0.79%, and the added 0.14%.

The of small-cap stocks rose 0.66%, while the Cboe Volatility Index was down 5.68%.

Among companies with at least $10 billion in market value, Rivian Automotive Inc. Cl A (RIVN), was the biggest leader during the session, jumping 15.03%, and Rocket Lab Corp. (RKLB) jumped 11.05%. Micron Technology Inc. (MU) rounded out the top three leaders on Thursday, with shares surging 10.21%.

Insmed Inc. (INSM) posted the largest decline, plunging 16.08%, followed by FactSet Research Systems Inc. (FDS) shares, which dropped 7.66%. Shares of Diamondback Energy Inc. (FANG) fell 4.59%.

In commodities news, Brent crude oil futures were down 0.22%, and gold futures were down 0.20%. climbed 0.44% to $85,041.

The 10-Year Treasury yield slipped to 4.120%.

Stock indexes in Asia were mixed, with Japan’s NIKKEI 225 Index down 1.03% and China’s Shanghai Composite Index up 0.16%.

In Europe, indexes rose, with the STOXX Europe 600 Index adding 0.96% and the FTSE 100 Index adding 0.65% from the previous close.

U.S. stock markets close for trading at 4 p.m. ET. For regular updates on the trading day, visit Barron’s.

Editor’s Note: This story was auto-generated by Automated Insights, an automation technology provider, using data from Dow Jones and FactSet. See our market data terms of use.