Effective Fed Funds vs SOFR

Effective Fed Funds Rate and SOFR are connected through the Treasury yield curve and monetary policy expectations. When the policy rate path shifts, both respond, though with different sensitivities and at different speeds. The spread between Effective Fed Funds Rate and SOFR captures the specific macro signal that flows through this relationship.

Effective Fed Funds Rate tends to lead SOFR during policy regime shifts, where the short end moves before the long end reprices. In those periods, moves in Effective Fed Funds Rate precede corresponding moves in SOFR by days to weeks, depending on the transmission channel and the depth of each market.

Long-run correlation between Effective Fed Funds Rate and SOFR varies by regime. Yields at different maturities are typically positively correlated in direction but differ in magnitude, which is what makes the spread informative. The correlation is not stable: it shifts with macro conditions, and the periods when it breaks down are often the most informative moments in the Effective Fed Funds Rate-SOFR relationship.

Divergence between Effective Fed Funds Rate and SOFR typically arises from quantitative easing, quantitative tightening, foreign reserve flows, or term premium dislocations. When one asset's idiosyncratic drivers dominate, the spread moves in ways that the common macro story does not predict, which is usually a signal to look more carefully at the specific drivers at work in Effective Fed Funds Rate or SOFR.

Within the Treasury curve, Effective Fed Funds Rate is not typically a hedge for SOFR; they are both duration exposures with different convexity and roll characteristics. Effective hedging requires matching the hedge to the specific risk being protected, and the Effective Fed Funds Rate-SOFR pair is best stress-tested under scenarios the investor most worries about before being sized into a real portfolio.