The RRP Buffer Is Gone. Reserves Are on Their Own.

Reverse repo facility take-up is down to $1.4bn. The monetary shock absorber is empty.

The shock absorber empties

For 2 years, Treasury bill issuance and quantitative tightening did not drain bank reserves. They drained the Federal Reserve overnight reverse repo facility instead.

That trade is over. Take-up at the reverse repo facility printed at $1.4bn (as of 14 Sep). In practical terms, the facility is empty.

When the RRP was above two trillion dollars, money market funds absorbed new Treasury paper by pulling cash from the Fed. That sterilized the liquidity impact of debt issuance. Today, that buffer is gone.

The mechanical transition

The balance sheet arithmetic is unyielding. Federal Reserve liabilities consist primarily of currency, the Treasury General Account (TGA), the reverse repo facility, and reserve balances.

With the RRP at $1.4bn (as of 14 Sep) and TGA balances at $722.2bn, any subsequent Treasury cash build or ongoing balance-sheet runoff comes dollar-for-dollar out of bank reserves.

Reserve balances stood at $2,991.3bn (as of 9 Sep). That is still above the estimated Lowest Comfortable Level of Reserves (LCLOR), but reserves are now the sole marginal liability absorbing Treasury supply.

The price of overnight money

So far, funding markets show no acute stress. SOFR printed at 3.62% against an Interest on Reserve Balances (IORB) rate of 3.65% (as of 15 Sep), leaving the SOFR-IORB spread negative at -3 basis points. The Effective Federal Funds Rate is 3.63%.

Overnight money trading below the administered rate confirms aggregate liquidity remains sufficient today. Cash is not scarce in the triparty repo market yet.

The risk is not where SOFR prints on a quiet Tuesday. The risk is the margin of safety at month-end and quarter-end settlements when Treasury auction settlements collide with tax dates without the RRP cushion.

What changes the regime

The earliest warning sign of balance-sheet friction is not a spike in the 10yr yield (now 4.97%). It is the SOFR-IORB spread flipping persistently positive.

A SOFR print sustained above IORB signals that primary dealers and banks are bidding up cash to finance Treasury inventory, marking the shift from reserve abundance to reserve scarcity.

Until that spread widens, front-end yields (2Y at 4.65%, 5Y at 4.80%) reflect Fed terminal rate expectations and term premium, not funding dislocation.

This is the same drain, read from the other side. Monday's piece on the commodity complex (Everything Real Got More Expensive) showed oil and copper repricing hard while the system absorbed it, and Monday's read of the fear gauges (The Good News Is in the Fear Gauges) found credit spreads at the 10th percentile and claims at the 4th. A balance sheet with no shock absorber left is the mechanism underneath both: the plumbing that would normally cushion a drawdown is the plumbing that is now gone, and risk appetite is priced at 73 of 100 with almost no cushion beneath it. That is why the gauge on the terminal above matters more than the level of any single series here.