ARM Index Source

ARM index values are pulled every 4 hours from the following sites.


1 Year LIBOR:

1, 3, 5, 10 Year Treasury (CMT):

1 Year MTA:

11th District Cost of Funds (COFI):

Prime Rate:

*Note: Optimal Blue does not store the ARM index from the day of lock. The ARM index on locked loans will update as the values from these sites change.

Leave a Reply