@flu
I hope you are not carrying a balance on that card. Some of the banks are jacking up the rate to try to squeeze you.. and hoping that you don’t notice or protest on the rate. It happened to my S.O. and she called in an complained literally with.. “whats up with this rate change“. They lowered her back down near to where she was. If you have a good FICO and have not been late, they are likely to lower it if you call in and complain.
NOTE: The banks are trying to give themselves headroom before the new credit laws take effect.