The 1 Year Constant Maturing Treasury (CMT) for September was 0.11%, which remains the same the past three months. Many older Adjustable Rate Mortgages (ARMs) are tied to this rate. The policies of the Federal Reserve continue to keep the rate near historical lows.
The 12 Month Treasury Average (12 MTA or 12 MAT) for September comes in at 0.115%, again the lowest rate in its history.
Other rates:
See:
https://www.moneycafe.com/personal-finance/cmt-rate-1-year-constant-maturity-treasury/
https://www.moneycafe.com/personal-finance/12mta-and-12mat-12-month-treasury-average/