WASHINGTON -- Check your holiday credit card bills closely. Some credit card companies are raising interest rates on good customers even if they pay down their balances, on time, every month. The reason they cite is that the customer's credit rating has fallen elsewhere. That was a rude surprise to Janet Hard, a stay-at-home mother of two teenage boys from Freeland, Mich. Depending on her husband's salary as a steamfitter while she raised the children was financially difficult, Hard said. To keep the family's finances in balance, Hard said she paid more than the minimum payment on her Discover card...
