An OECD warning of economic damage from President Trump's tariffs has put investors on watch for progress in US trade talks.

Trump ‘revenge tax’ may open new front in global trade war, with consequences for your wallet.

The 30-stock Dow Jones Industrial Average and S&P 500 were flat after opening, while the tech-heavy Nasdaq Composite gained 0.3%.

Nvidia has overtaken Microsoft as the largest U.S. company by market value, regaining the throne that it forfeited during the AI-stock selloff in late January. Nvidia shares rose 2.9% during Tuesday’s trading.

Nvidia reclaims top spot as the most valuable publicly traded company with a $3.45 trillion market cap, surpassing Microsoft.

Nvidia stock closed as the largest U.S. company by market value on Tuesday. The stock edged higher as investment bank Jefferies added the chip maker to its list of highest-conviction picks. Nvidia shares rose 2.