Yaccarino's departure caps a tumultuous run atop Elon Musk's social-media platform and ​comes after the merger of xAI with X. Aiming for a $75 million initial fund closing, the new venture investor ...

Nvidia stock briefly topped a $4 trillion market cap with Nvidia chipmaker Taiwan Semi on tap. AI plays Astera Labs and Rubrik flashed buy signals.

President Donald Trump mentioned Tuesday - almost in passing - that he planned to impose a 50% tariff on copper imports. The remark hit like a bombshell and has the potential to shake up U.S. efforts ...