By Hannah Lang (Reuters) -The U.S. Consumer Financial Protection Bureau (CFPB) plans to start regulating “buy-now, pay-later” (BNPL) companies like Klarna and Affirm Holdings due to worries their fast-growing financing products are harming consumers, the agency said on Thursday. The watchdog, which does not currently oversee BNPL companies or products, will issue guidance or a rule to align sector standards with those of credit card companies, it said. The agency also said it would implement appropriate supervisory examinations. The development will be a blow for the sector, which is already u…