Nvidia and AMD extend gains after the chip makers sign deals with Saudi Arabia, UnitedHealth claws back some losses from the previous session, and American Eagle Outfitters slumps after pulling guidance for the rest of the fiscal year.

The White House unveiled what it says is $600bn worth of defence and artificial intelligence deals with Saudi Arabia, UnitedHealth Group shares sink to the lowest level in more than four years, and US inflation fell to 2.3 per cent in April. Plus, Nissan plans to axe 15 per cent of its global workforce and almost halve its number of plants.

May 13 (UPI) -- UnitedHealth Group announced Tuesday CEO Andrew Witty will step down, citing "personal reasons." Witty will leave the role of CEO and be replaced by Stephen J. Hemsley, effective immediately.

Andrew Witty is stepping down from his position as UnitedHealth's CEO for personal reasons, insurer says in surprise announcement.

Shares of UnitedHealth Group sank sharply on Tuesday as the health insurance giant replaced its CEO and suspended its 2025 outlook.

UnitedHealth Group Incorporated stock drops after a rare earnings miss and CEO resignation. Click for the impact and potential buying opportunity in UNH at $335.

Surging medical costs and regulatory changes hit UnitedHealth, but rivals such as Humana and CVS look better positioned.