The rail is funded. The cash still has to be there.
Meridian got rid of the nostro. A payout still needs USDC ready at that moment, in that corridor. Parking it “just in case” is the leftover problem.
Problem
Stablecoins remove the bank account. They do not remove the need to hold dollars.
Meridian’s pitch is simple: stop pre-funding nostro accounts. The industry still sits on about
$4 trillion of idle cash so FX can settle when the other side is not funded yet.
Moving that onto stablecoins means you no longer keep a balance at every correspondent bank.
You still need USDC in the wallet when a payment has to go out.
$4T
Idle nostro cash the industry is trying to free. After Meridian, the bottleneck is not the rail. It is having USDC on hand the moment a payout fires.
Today that means parking USDC across 40+ pairs as a permanent buffer, sized for the worst day
on the worst corridor. Most of it sits unused. If the matching inflow arrives early, you already paid to hold
cash you did not need — dead money, now on-chain instead of in a bank.
Solution
Keep a smaller cash balance. Borrow for 1 or 3 days only when a payout needs it.
Meridian treasury already holds hard assets such as Bitcoin. Keep a small USDC float for operations,
and borrow on Morpho Midnight against that Bitcoin for the size of the payment — not a peak buffer
parked all month. The rate and the amount to repay are fixed when the loan is taken. One day or three days.
If the money comes back early, close the loan the same day. The Bitcoin stays on the book.
This is collateralised lending, protected by an agreement. Meridian posts hard assets it already holds
— Bitcoin first — as collateral. The Midnight contract sets what is owed, by when, and what happens if it is not
repaid. It is not an unsecured line and not a handshake with a named lender.
Today · parked cash
USDC sitting on every corridor “just in case”
Sized for the peak, idle most of the time
Earns nothing while it waits
Inflow arrives early → already paid to hold unused cash
Midnight · pay for what you use
Borrow only what this payout needs
Bitcoin (and other hard assets) as collateral
Terms sit in the agreement
Inflow arrives early → repay, Bitcoin released
How it works
→→→→
Meridian posts Bitcoin (or other hard assets already on the treasury book), borrows USDC, and agrees to repay a known
amount by a known date — all of it written into the Morpho Midnight agreement. The loan is not tied to one named
lender. If the matching inflow lands before that date, Meridian does not sit out the remaining hours. It
closes the loan and the Bitcoin is released.
Closing early — three options
If the money comes back before the loan is due, you do not have to pay for the unused days in full.
Repay in full
Pay back the original amount plus all the interest for the whole term. Always available. No one else has to take the other side.
Always on
Hand it off at the market rate
Someone else takes the loan at today’s rate. Usually cheaper than paying in full, because you are not prepaying interest for days you no longer need.
Needs a buyer
Wait for your own rate
Post the rate you are willing to pay to close. The loan stays open until someone takes it, or Meridian cancels and pays in full instead.
Closes when taken
Handing the loan off is almost always cheaper than paying the full amount. If rates have gone up since Meridian borrowed,
it can even cost less than the original draw. If rates have gone down, it costs a bit more than the draw — still less
than paying everything due at the end of the term.
Worked example
AED → USD payout: 2.4m USDC due in six hours. Matching inflow expected the next day.
Old way: park 2.4m USDC on that corridor all month. New way: post Bitcoin Meridian already holds, under the Midnight
agreement, borrow 1 day of 2.4m USDC, send the payout. Four hours later the inflow lands. Bitcoin
is released when the loan closes.
Borrowed2,400,000 USDC at 5% APR, 1 day
If held the full dayrepay ≈ 2,400,329
Pay in full at hour 42,400,329 — all the day’s interest
Hand off at ~5%≈ 2,400,000 — unused hours not prepaid
Vs parking 2.4m for 30 daysPay for the hours used, not the month
Numbers are illustrative. A hand-off only works if someone is offering to take the loan.
Thin corridors may still need cash sitting ready — that is the next brief.