Nvidia shares fall 9.3% in worst chip stock day since 2020, sparking sell or hold debate for retirees.

Nvidia shares dropped 9.26% on the worst day for chip stocks since 2020, falling to $186.64 after a recent peak of $239.24. A retiree who bought 1,000 shares at $121.79 each now faces a portfolio where Nvidia makes up 23.7%, raising concerns about co...