Warren Buffett reaps $40 billion from giant Apple…

Warren Buffett.Gerald Miller | CNBCAn off-brand move to pile into Apple shares might have been Warren Buffett's greatest trade ever. Berkshire Hathaway's Apple stake — which is now 40% of its equity portfolio — is up a whopping…

Why new U.S. rules on selling chips to…

The United States' latest move to restrict chip sales to Huawei could be a big blow to the Chinese technology giant, hitting its two biggest businesses and offering very little wriggle room for the firm…