Insight · The market

What is the secured Eurodollar?

A dollar claim secured on local sovereign bills, with the currency tail retained by consent: the correction of the first Eurodollar’s two deficiencies.

The Eurodollar market began in the late 1950s as an accident: Soviet trade balances parked in London for fear of seizure, and corporate deposits escaping Regulation Q’s interest ceilings, in a City that saw no reason to regulate other people’s currency. From that accident grew the largest pool of credit in history. Dollar credit to non-banks outside the United States stood at $14.3 trillion at the end of 2025, according to the BIS, growing at its fastest rate since 2014. For half a century the pool set the world’s benchmark lending rate and financed the recycling of petrodollars.

It has two deficiencies, and 2008 exposed the first. The Eurodollar is an unsecured claim on offshore balance sheets: it sits on collateral it does not hold. When collateral valuations came into doubt, the most liquid money market in the world froze, and the system survived only because the Federal Reserve extended swap lines to foreign central banks. The second deficiency is quieter. The pool earns its own reference rate, the dollar risk-free rate, and that rate is now the obligation of a sovereign that crossed $40 trillion of debt on 19 August 2026, with net interest above $1 trillion a year. The refuge asset of 2008 is the slowly debasing asset of 2026.

The system has already half-corrected. In 2023 it retired LIBOR, the unsecured rate the Eurodollar itself had given the world, and re-anchored dollar finance to SOFR, drawn from more than $3 trillion a day of Treasury-collateralised repo. The reference rate went secured. The assets did not. A benchmark is not collateral.

The secured Eurodollar finishes the sentence. It is a dollar claim secured on short-dated local sovereign bills held onshore in a bankruptcy-remote structure, the hardest collateral each emerging market possesses. The yield crosses to the dollar holder through a senior claim. The currency tail does not cross whole: a domestic institution elects to hold a bounded share of it through a junior layer, and is paid a premium for judging a risk it knows better than any offshore desk. A rules-based engine computes both sides daily and parks exposure at pre-committed thresholds. What the first Eurodollar was to unsecured offshore credit, this is to secured offshore yield: the dollar stays a dollar, the collateral is sovereign, and the spread over Treasuries is real.

Two things distinguish it from a carry fund. The claim is secured, and the risk is divided by rule rather than carried whole. Those are the two things the first Eurodollar never had. The name is Mustafa Zaidi’s, offered over breakfast in August 2026; the argument is set out in Why We Must Exist, available on request, and in The Dollar Denominator.