Foreign Central Bank Custody Outflows Hit $58B as 5.19% Yields Reprice Dollar Demand

The Custody Exodus: Why Foreign Central Banks Are Dumping Treasuries

Foreign central banks are selling US Treasuries from their Fed custody accounts at the fastest pace in four years. Over the past four weeks, custody holdings fell by $58 billion, the largest monthly decline since late 2022, according to the latest Fed data. The drivers are twofold: first, central banks in Asia and the Middle East are intervening in currency markets to slow the depreciation of their currencies against a resurgent dollar, which has been bolstered by 5.19% 10-year yields. Second, reserve managers are rebalancing their portfolios away from long-duration bonds, which have suffered mark-to-market losses, into shorter-term, higher-yielding T-bills. The 3-month T-bill yield at 4.25% offers a compelling alternative with minimal duration risk.

The selling pressure is concentrated in the long end. Foreign official holdings of bonds with maturities of 10 years or more have declined by $32 billion in the same period, while holdings of bills have actually increased slightly. This rotation is exacerbating the steepening of the yield curve: the 10-year yield has risen to 5.19%, while the 2-year yield has edged up to 4.85%, widening the 2s10s spread to +34 basis points. In plain English, the curve is steepening because foreign central banks are dumping long-term bonds while keeping their short-term cash parked in bills, which is the opposite of the "flight to safety" behavior you'd normally see in a crisis. This is a disorderly repricing of duration risk.

The Dollar Squeeze: Why Foreign Official Selling Tightens Global Liquidity

When foreign central banks sell Treasuries, they are effectively pulling dollar liquidity out of the global financial system. Think of it like this: the Fed's custody account is the world's largest dollar savings account, and when foreign authorities withdraw $58 billion, that cash goes into the private banking system or is used to buy their own currencies, reducing the supply of dollars available to lend. This tightening shows up in cross-currency basis swaps, which have widened to -45 basis points for 3-month EUR/USD, signaling that dollar funding is becoming more expensive for non-US banks. The Fed's dollar liquidity swap lines, which provide dollars to foreign central banks, have seen modest usage of about $8 billion, but nowhere near the pandemic-era levels. The message is clear: the world is short dollars again, and at 5.19% yields, the price of dollar liquidity is being repriced higher.

Why the Fed Funds Rate Is a Range: The Mechanics of Reserve Demand

The Fed's custody account is separate from the Fed's own balance sheet, but the outflows have implications for the implementation of monetary policy. The Fed currently targets a fed funds rate range of 4.50% to 4.75%, and the committee last cut rates in September. The range exists because the Fed sets an upper bound (the interest on reserve balances rate) and a lower bound (the overnight reverse repo rate), with the effective fed funds rate trading somewhere in between based on reserve scarcity. When foreign central banks withdraw dollars from custody, they are effectively reducing the supply of reserves in the banking system, which pushes the effective fed funds rate toward the upper bound of the range. This is why the Fed is watching custody outflows closely: if they persist, they could force the Fed to adjust the range or slow the pace of quantitative tightening. The Fed today is in a holding pattern, but the next FOMC meeting in December will be crucial, especially with the 10-year yield at 5.19%.

Positioning & Liquidity Map: Who Is Trapped?

The biggest losers from the foreign official selling are long-duration bond bulls, including pension funds and insurance companies that have been extending duration to lock in higher yields. Many of them are underwater on their positions, and with the 10-year at 5.19%, the temptation to average down is strong. But foreign central banks are the ones who are trapped: their reserves are being depleted, and they have limited options. Japan, in particular, has spent over $30 billion this month defending the yen, and its reserve stockpile of Treasury bills is shrinking. The marginal buyer of Treasuries right now is the US private sector, particularly money market funds and banks, who are absorbing the supply and pushing short-term rates up. The liquidation pools are concentrated in the 10-year futures market, where open interest has fallen by 5% as long positions are liquidated. Stop-loss clusters sit just above 5.25% on the 10-year yield, which could trigger a cascade.

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