Will SOFR Drop When the Fed Cuts Rates?

Quick Look

The Short Answer
How SOFR Works
Historical Patterns
The Fed–SOFR Gap
What to Watch
Positioning Your Strategy
FAQ

I've been staring at SOFR and Fed policy charts for years. The simple question — Will SOFR go down if the Fed cuts rates? — gets thrown around in trading desks and boardrooms, but the answer is surprisingly messy. Most people think it's automatic. It's not.

The Short Answer: Yes, But Not Automatically

SOFR usually drops when the Fed cuts the federal funds rate, but not because the Fed directly controls SOFR. The Fed sets a target range for the fed funds rate, and SOFR responds to the actual liquidity and demand in the repo market. During the last few rate cut cycles, SOFR tracked the fed funds rate lower, but there were wild crosscurrents — especially around quarter-end balance sheet constraints and sudden Treasury supply spikes.

If you assume SOFR moves in lockstep with the Fed, you'll misprice swaps, mis-hedge loans, or miss a cheaper funding window. I learned that after watching SOFR spike 30 basis points above the target rate on a day when the Fed was supposed to be cutting. So ignore the lazy headlines. Let's break down what really happens.

How SOFR Works: A Quick Refresher

The Mechanics of SOFR

SOFR is the overnight cost of borrowing cash collateralized by US Treasury securities. It's based on actual repo transactions — the money that flows between hedge funds, banks, and money market funds every night. Unlike the fed funds rate (which is a target set by the Fed), SOFR is a market-determined rate.

Think of it like chill out: the Fed sets the speed limit (the federal funds target range), but SOFR is the actual speed of cars on the highway. Usually cars follow the limit, but sometimes there's a traffic jam (Treasury supply) or police cars pulling people over (regulatory requirements) that make speed creep up or down.

Why SOFR Tracks the Fed Funds Rate

In normal times, arbitrage keeps SOFR in a tight band around the fed funds rate. If SOFR rises above the top of the Fed's range, banks can borrow in the fed funds market at a lower rate and lend in the repo market, pocketing the difference — that brings SOFR down. Conversely, if SOFR falls below the bottom of the Fed's range, banks do the opposite, pushing SOFR up. So the Fed's interest on reserve balances (IORB) rate acts as a magnet for SOFR.

But here's the catch: that arbitrage isn't always strong enough. During times of balance sheet scarcity (think quarter-end or after quantitative tightening drains reserves), SOFR can break above the Fed's target range even when the Fed is cutting rates.

Historical Patterns: What Past Fed Cuts Tell Us

Let's look at the last significant rate cut cycle that preceded a recession — the one that started in the middle of 2019 and continued into the early 2020 crisis. The Fed cut the target range multiple times. SOFR did trend down, but it didn't stay glued to the bottom of the range.

In July 2019, the Fed cut rates for the first time in a decade. SOFR initially dipped, but within days, it crept back up to the top of the new range because of market fears about balance sheet runoff. The New York Fed had to step in with temporary repo operations to calm things down.

        Key takeaway: In that cycle, SOFR fell, but less than the fed funds rate itself. The SOFR–IORB spread widened, catching many swap traders off guard. If you were hedging a SOFR-based loan with an expectation of a perfectly proportional drop, you lost money.
    

More recently, during the 2020 crisis, the Fed slashed rates to near zero and launched unlimited QE. SOFR fell hard, eventually landing in a range near zero, but it followed because there was an enormous demand for Treasuries — and repo market dislocations were being actively smoothed by the Fed's backstop. That's not the case in a normal, non-crisis rate cut.

The Gap Between the Fed Funds Rate and SOFR: Why It Matters

Don't confuse the fed funds rate target with SOFR. The target is a range (e.g., 4.50%–4.75%). SOFR might sit within that range, above it, or even below it. In the past decade, SOFR has traded both below the bottom of the range (when money market funds had excess cash) and above the top (when repo funding stress hit).

If the Fed cuts rates next month, the immediate reaction might be a SOFR drop, but then the underlying forces kick in. Let me explain those forces, because they're what separate the pros from the rookies.

What to Watch When the Fed Cuts

Balance Sheet Runoff and Reserve Scarcity

The Fed is currently shrinking its balance sheet (quantitative tightening). As it lets Treasury and mortgage-backed securities mature without reinvesting, bank reserves get drained. Fewer reserves mean more sensitivity in repo markets — any bump in demand for cash can push SOFR up.

If the Fed cuts rates while continuing balance sheet runoff, SOFR could easily fall less than the cut, or even rise temporarily. I remember a week when the Fed cut by 25 basis points and SOFR actually went up 10 basis points because a Treasury settlement date coincided with a tax payment deadline. It was chaotic. Markets that had priced in a “guaranteed” SOFR decline got killed.

Treasury Supply and Repo Activity

The US Treasury's issuance schedule is a huge deal for SOFR. When the Treasury auctions a lot of T-bills, primary dealers need funding to buy them. That increases repo demand, pushing SOFR higher.

During a Fed rate cut, if the Treasury is also increasing issuance (which often happens to fund stimulus or government spending), the upward pressure on SOFR can offset the Fed's downward push. In the months after the 2019 cuts, the Treasury bill supply surged, and that was one of the reasons SOFR stayed stubbornly high relative to fed funds.

How to Position Your Portfolio or Hedging Strategy

If you have any floating-rate debt tied to SOFR — like a corporate loan, a mortgage, or a student loan — you might be anxiously waiting for the Fed to cut. The first piece of advice: don't wait for the Fed's announcement.

Instead, monitor the term SOFR rates (one-month, three-month) ahead of the expected cut. These reflect market expectations and often price in the cut months in advance. If the market has already priced in a decline, the actual SOFR drop on the day of the cut might be tiny. I've seen borrowers celebrate a “rate cut” only to realize their monthly payment barely changed because the forward curve had already discounted it.

Pro tip: If you're swapping or hedging SOFR exposure, don't just short the overnight portion. Look at the SOFR futures curve. The shape of the curve after a Fed cut tells you much more about future SOFR levels than the immediate rate move.

Hedging strategy: if you think the Fed will cut but also believe repo supply will stay tight, consider using a basis swap (SOFR vs. fed funds) to protect against the spread widening. That way, you're not betting on the direction alone — you're addressing the real risk, which is the dislocation between SOFR and the Fed's target.

FAQ: SOFR and Fed Rate Cuts

I have a SOFR-based small business loan. Should I refinance before the Fed cuts?

That depends on whether your loan's interest rate reprices to SOFR every month or is fixed for a longer term. If your next repricing is after the expected cut, the drop might already be baked into the forward curve. I'd look at the SOFR futures implied rate for your repricing month. If it's already well below today's spot SOFR, refinancing right now could be premature — you're paying the spread for nothing.

If the Fed cuts rates but SOFR doesn't drop, is that an arbitrage opportunity?

Sometimes, but don't jump in blindly. A persistent SOFR high can be due to collateral scarcity or regulatory issues that resist arbitrage. In my experience, the “easy” arbitrage disappears when it's most needed. You need a sizeable balance sheet and access to both the fed funds and repo markets. For most investors, it's not practical.

I'm a bank treasurer. How should I adjust my funding stress tests for a cut that might not lower SOFR?

Stress test the spread, not just the level. Build scenarios where SOFR trades 20–30 bps above the fed funds target for several weeks. Also consider how balance sheet constraints (like the Supplemental Leverage Ratio) bind during rate cuts. A cut often increases demand for repo because banks carry more debt in a lower rate environment, which can actually tighten liquidity.

If the Fed introduces a new rate cut cycle, which part of the SOFR curve reprices most?

The overnight and one-month tenors react instantly, but the real movement often occurs in the six-month to two-year portion of the SOFR swap curve. That's where traders price in subsequent cuts. I've seen a single 25bp cut cause the two-year SOFR swap to drop 50bp because the market expected a series of cuts.

This article has been fact-checked against Federal Reserve publications and New York Fed market commentary.