HSBC Holdings lifted the lid on the banking industry’s U.S. sub­prime exposure a year ago when it revealed loan impairments that so far total $27.8 billion and are expected to keep rising as the U.S. housing market con­tinues to sour. But the bank is still keen on the subprime sector. “You don’t chuck a whole business and a whole franchise just because you’re in the down­turn in the cycle,” says Brendan McDonagh, who became CEO of HSBC Finance Corp. last year. “You have to manage it right.” Evidently, McDonagh, 49, has been managing right: He was elevated last month to CEO of HSBC North America Holdings and joins the group management board of parent bank HSBC Holdings as group managing director.