S&P 500 closes at a record as Constellation jumps 12% on Google nuclear power deal
The S&P 500 closed above 7,800 for the first time Tuesday, its first record finish since August, as Treasury yields eased off a 24-year high. Maryland-based Constellation Energy led the index after agreeing to sell Google 3,590 megawatts of power.
The close (Tuesday, Oct. 6): The S&P 500 rose 44.98 points, or 0.6%, to 7,818.93, topping its prior record from August, the AP reported. The Dow Jones Industrial Average gained 253.38 points, or 0.5%, to 51,521.28, and the Nasdaq composite added 122.48 points, or 0.4%, to 27,599.79, its second straight record. The Russell 2000 index of smaller companies fell 0.6% to 2,830.30. It was the S&P 500’s 28th record close of 2026 and its fourth straight gain, according to Dow Jones Market Data.
Bonds: The 10-year Treasury yield, which influences mortgage and loan rates, slipped to about 5.28% in late trading after topping 5.35% Monday, its highest since April 2002, Investopedia reported.
The big mover: Constellation Energy shares surged 12%, the best in the S&P 500, Investopedia said. Google agreed to a 20-year deal to buy 890 megawatts of new nuclear capacity that Constellation will create by upgrading 11 existing reactors in Illinois, Pennsylvania and New Jersey, plus a long-term supply deal for another 2,700 megawatts, CNBC reported. The companies said the agreements will support more than $4.3 billion in new Constellation investment, with the first upgraded plant expected to deliver power in 2028. All of it is on the PJM grid, which serves 13 states and D.C., including Maryland.
Other moves: Option Care Health jumped 33% after agreeing to be bought by private-equity firm CD&R and McKesson for $32.05 a share. Lamb Weston rose about 10% after beating profit forecasts and raising its outlook. Marvell climbed more than 7% after lifting its long-term sales targets. Memory-chip makers fell, with Seagate down 9% and Western Digital down 7%, Investopedia reported.
Commodities: Brent crude rose 0.7% to about $101 a barrel and U.S. crude rose 0.4% to $89.80, while gold futures gained 1% to $4,195 an ounce, according to Investopedia.
Ahead: The Federal Reserve releases minutes of its September policy meeting at 2 p.m. ET Wednesday.
Sources
- AP News (via WTOP) — How major US stock indexes fared Tuesday 10/6/2026
- Morningstar (Dow Jones) — S&P 500 rises 0.58% to 7818.93, new record close
- Investopedia — Markets News, Oct. 6, 2026: S&P 500, Nasdaq close at record highs as Treasury yields fall
- CNBC — Google enters massive 3.6-GW power deal with Constellation Energy
- Constellation Energy — Google and Constellation announce agreement to bring 890 MW of new nuclear capacity to PJM grid