In approximately XXXX during the credit financial crises the credit card companies greatly increased their APR rates. Card holders were given the choice of accepting the higher rate and keep the account open or to opt out of the higher rate and keep the original lower rate that would be fixed for the remainder of the balance owed and the account would be closed with no further credit allowed on that account. I opted out and had a fixed rate of 5.99 % on the balance owed and the account was closed to further credit. I was charged the rate of 5.99 % on the balance owed until XXXX XXXX. In XXXX XXXX the rate was bumped up to 6.24 % which I have been paying ever since. I called CITI Cards to find out why this higher rate is being applied to my balance as it is supposed to be fixed at 5.99 % for the remainder of the balance owed. Their statement was it was not their doing, but because the Federal Government raised the prime rate 1.25 % and this has to be passed on to the consumer. I called the CFPB and was told there was no such record of that happening or any reason for the card company to raise the rate that was supposed to be fixed on old balances. I would like to know if it is legal for CITI Card to raise the interest rate on an old balance from an account they closed in XXXX with the agreement that the balance of the amount owed would be charged at 5.99 % fixed when the card holder opted out of the higher rate out back in XXXX. 
