The world this week--BusinessRegulators around the world opened investigations into FTX, after the crypto exchange and its sprawling network of affiliated firms filed for bankruptcy protection.Traders withdrew $6bn from the platform in just 72 hours amid claims that it had mishandled customers’ investments.FTX could owe money to as many as 1m people.Its spectacular collapse has prompted calls for tougher rules to regulate markets in digital assets.After it declared bankruptcy in America a hacker, possibly an insider, stole around $470m from the exchange.Stockmarkets staged their biggest rally in more than two years on November 10th, after figures for American consumer prices were published.Annual inflation slowed to 7.7% in October, its lowest level since January.The S&P 500 surged by 5.5%, the NASDAQ by 7.4% and the Dow Jones Industrial Average by 3.7%.There were other signs of cooling inflation in America.A measure of wholesale prices rose by 8%, the smallest increase since July 2021.In Britain inflation headed in the other direction, accelerating to a 41-year high of 11.1%.Food prices rose by 16%, the most in 45 years.