What it means
Think of it as the plumbing behind international corporate finance rather than a place with a trading floor. Banks with surplus offshore currency lend it to banks that are short of it, and the rates they agree become the reference points for a great deal of commercial lending worldwide.
The market matters because it sets the price of short-term money for large borrowers. When a multinational borrows on a floating rate, the rate is usually a benchmark drawn from this market plus a credit spread, so movements here feed directly into the interest bill of companies that have never dealt offshore themselves.
Deals are large and documented lightly by retail standards. Transactions typically start at $1,000,000 and often run into hundreds of millions, terms range from overnight to a year, and most funding is unsecured, which means the lender relies purely on the borrower's credit rather than on collateral.
Longer-term borrowing is arranged through syndication. A lead bank agrees the terms with the borrower, then invites other banks to take shares of the loan, which spreads the exposure and allows a single borrower to raise far more than one bank would lend alone.
The important nuance is that this market has no lender of last resort in the usual sense. If offshore funding dries up, as it has in past credit squeezes, borrowers can find a facility they assumed was always available is suddenly expensive or simply unavailable.
In practice
Real-world examples.
Example
An Australian mining group needs $300,000,000 to build a processing plant. It borrows through a syndicate of eleven banks arranged in London, with the rate reset every three months against an offshore dollar benchmark, because no single lender would take the whole exposure.
Example
A Brazilian airline earns dollars from international ticket sales and borrows dollars offshore to buy aircraft. Matching the currency of its debt to the currency of its revenue removes most of the exchange rate risk from the deal.
Example
A European bank finds itself short of dollars over a quarter end when clients draw down credit lines. It borrows dollars overnight from another bank in the offshore market, repays the next morning, and pays roughly one day of interest for the convenience.
Formula
Calculation
Cost of a eurocurrency loan = principal x (benchmark rate + margin) x (days / 360).
A manufacturer draws $50,000,000 for 180 days. The benchmark offshore dollar rate is 4.5% and the bank charges a margin of 1.5%, so the all-in rate is 4.5% + 1.5% = 6%.
Day count fraction = 180 / 360 = 0.5.
Interest = $50,000,000 x 6% x 0.5 = $50,000,000 x 0.03 = $1,500,000.
If the benchmark rate rises to 5.5% at the next reset while the margin stays fixed, the all-in rate becomes 7% and the same six-month period costs $50,000,000 x 7% x 0.5 = $1,750,000, an increase of $250,000.Case study
Seen in the real world.
The following is an illustrative and entirely fictional scenario. Northmoor Chemicals, an invented specialty chemicals group, funded its working capital with a $120,000,000 revolving facility priced off an offshore dollar benchmark plus a margin of 1.25%. For three years the arrangement was cheap and the finance team barely thought about it.
Then a credit squeeze hit the wholesale funding market. The benchmark rate jumped by 1.8 percentage points in a matter of weeks, and Northmoor's banks invoked a market disruption clause allowing them to reprice the loan at their own cost of funds. The annual interest bill on a fully drawn facility rose by more than $2,000,000, which was roughly a fifth of the group's budgeted profit.
The lesson Northmoor's board took away was not that offshore borrowing was a mistake, but that the company had treated a floating rate as if it were fixed. The next refinancing split the facility into a fixed-rate tranche and a floating-rate tranche, and added an interest rate cap on part of the floating exposure.
Watch out
Common mistakes.
- Confusing this market with foreign exchange. Currencies are not swapped here; they are deposited and lent in their own denomination, and any conversion happens separately.
- Treating the quoted benchmark as the total cost. The borrower always pays the benchmark plus a credit margin, and often arrangement and commitment fees on top.
- Assuming an agreed facility is guaranteed money. Many agreements contain market disruption and material adverse change clauses that let lenders reprice or withdraw in stressed conditions.
Questions
People also ask.
Who actually borrows in this market?
Large companies, banks, governments and public agencies, since minimum deal sizes make it impractical for smaller borrowers.
Why is so much of it denominated in dollars?
The dollar is the main currency of international trade and commodity pricing, so the deepest pool of offshore deposits and loans is in dollars.
Does this market affect ordinary business loans?
Indirectly but genuinely, because the benchmark rates set here feed into the floating rates that many domestic commercial loans are priced against.
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