Nvidia shares slump amid reports US is ramping up antitrust investigation

Fall overnight comes after it shrinks by $279bn on Tuesday in biggest one-day drop in value by US companyBusiness live – latest newsShares in the AI chip designer Nvidia have continued to slide overnight after a report said US authorities were ramping up an investigation into whether the company had breached competition laws.The company’s shares fell 2.4% in after-hours trading, exacerbating a near-10% drop in the regular trading session that slashed its value by $279bn (£212bn