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What an interbank trading venue is, and what it should be

How interbank trading venues work today, what a trade really costs, and the case for a neutral venue owned by the institutions that trade on it.

Written by Nicholas J Runcorn, Founder, Chair and CEO

An interbank trading venue is where banks and dealers trade with each other. Rates, FX, bonds and money markets change hands between institutions there before any price reaches the rest of the world.

For decades that market has run on two models. The first is the interdealer broker, which matches buyers and sellers anonymously, often by voice, and takes brokerage on every trade. The second is the electronic platform, which automates the matching but usually keeps the same pricing. Either way, the desk pays per ticket.

What a trade actually costs

An institution pays for one trade four separate times. The brokerage. The settlement chain behind it. The reconciliation work that nobody invoices but everybody staffs. Then the data, sold back to the desks that created it. Only the first of those is ever negotiated, and it is rarely the largest.

Per ticket pricing has a second effect that is easy to miss. It taxes activity. A desk that trades more pays more, and nothing in that model has a reason to reduce the number of tickets a bank needs.

What a venue should be

IDBX is built on a different set of assumptions.

Subscription, not brokerage. Participants pay a fixed subscription per active trader. Cost stops tracking activity, so a desk that doubles its volume pays nothing more. The Meter lets you enter your own rates and see the difference.

Netting at the point of execution. IDBX nets at the execution stage, and only within a compatible settlement set, meaning the same rail, the same currency and the same settlement date. Obligations that do not share all three are never netted together.

Settlement on the right rail. IDBX is architected to support settlement in central bank money where available, and to hand each obligation to the infrastructure that should settle it.

Traditional and tokenized on one venue. A tokenized bond is still a bond. Both trade on the same rail, into the same settlement, under the same governance.

Intelligence that cannot trade. AIDANN, the IDBX trade assistant, reads the book, the obligations and the netting set and tells a desk what it is looking at. It holds no permission to place, amend or cancel anything.

Owned by its users. IDBX is built for the global interbank market, and we are looking to partner with some of the largest banks in the world with the intention that they own it. Neutrality you can read in a share register is the only kind worth having.

The hard part

A new venue starts with an empty book. Liquidity goes where liquidity already is, and no desk moves its flow to a venue its counterparties are not on. That is the hardest problem any new venue faces, and no feature solves it on its own.

It is also why ownership matters. When the institutions that provide the liquidity own the venue, the first counterparties arrive together rather than waiting for each other.

Questions people ask

Is IDBX an interdealer broker?

No. IDBX is an electronic interbank venue. It matches institutions on rules, charges a subscription instead of brokerage, and nets and orchestrates settlement after execution. How the execution works.

How does IDBX charge?

A fixed subscription per active trader, with no per ticket brokerage. Why it is priced this way.

Does IDBX take counterparty risk?

No. IDBX does not become a counterparty, does not novate trades and does not take principal risk.

What does IDBX trade?

IDBX launches in FX swaps, interest rate swaps, bonds and NDFs, with money markets and tokenized instruments on the same venue.

Who can trade on IDBX?

Banks and dealers, onboarded institution by institution. Request onboarding.

Any asset. Any money. One intelligent venue.

The engine computes. AIDANN describes. Nothing is generated.
Written by Nicholas J Runcorn, Founder, Chair and CEO, IDBX Corporation Ltd. IDBX Markets Ltd is not currently authorised by the Financial Conduct Authority.
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October 19, 2026
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