<strong><span class="subhead">Thumbs up</span></strong> No need to worry about Kansas City-based Commerce Bancshares, even if the economy should weaken, says credit rating agency Moody’s Investor Services. The $18.8 billion banking company had been on Moody’s negative outlook list since March 2009. But that has changed to “stable,” Moody’s said, because Commerce didn’t load up on risky commercial real estate loans, kept its growth pace moderate and made smart home loans.