Today’s ranking is taking shape. Explore the latest market stories below.

U.S. stocks split sharply at Thursday’s close, even after long Treasury yields reversed. The Nasdaq Composite fell 1.25% to ...

The S&P 500 closed at a record 7,818.93 on Tuesday, up 0.58%. Yet it finished 25.59 points below its intraday peak. The ...

U.S. stocks opened unevenly on Monday as a 5.30% 10-year Treasury yield restrained an otherwise broad advance. The Nasdaq Composite gained 0.5% by 10:05 a.m. EDT. The S&P 500 added 0.2% soon after the ...

The Nasdaq Composite was down 0.47% at 27,468.99 by 12:50 p.m. EDT. It had gained 0.12% from the cash open. The 10-year yield eased to 5.316% from 5.364% at its high. The recovery remained narrow. The ...

OpenAI disclosed on September 30 that a coordinated campaign tried to extract hidden reasoning from its models. Activity began July 1, then peaked on July 24 and 25. Those two days brought 16,000 ...

The S&P 500 rose 0.72% to 7,830.08 by 12:51 p.m. EDT. It remained on record-close pace. Utilities gained 2.51%, while the Russell 2000 fell 0.20%. The split matters for investors testing the ...

A 335-kilogram spacecraft built to inspect inactive satellites reached low Earth orbit on October 1. NASA confirmed that Otter 24C launched at 11:32 a.m. PDT on SpaceX’s Transporter-18 rideshare. The ...

Renesas began sampling a 650-volt gallium-nitride power switch on September 30 in an 8 × 8 mm package cooled from both sides. The TP65H020G4PLSGBD is aimed at the converter stage between an 800 V ...

An Australian Senate committee has sent written requests for OpenAI chief executive Sam Altman and Anthropic chief executive Dario Amodei to appear at an October 1 hearing in Canb ...

NASA has pushed a full-scale DAVINCI test sphere through six simulated descents to Venus temperatures. The campaign ran from August 28 through September 10. Each cycle raised the hardware to 465 ...