Rates
FRED public CSV data (no API key). SOFR is fetched daily and averaged to monthly means. CPI year-over-year is derived from CPIAUCSL. MMF segment yields are sourced from N-MFP monthly filings.
Fed funds vs. MMF segment yields
SOFR — monthly mean of daily observations
UNRATE — civilian unemployment rate
CPIAUCSL — 12-month percent change (derived)