T+1 Settlement: Why Faster Trades Reshape FX Funding

The Two Dates Behind Every Trade

When you buy a share, two things happen on two different days. The first is the trade date — the moment your order is executed and you agree on a price. The second is the settlement date — the moment the trade becomes official, when money actually moves one way and the security moves the other. For years in the United States, that gap was two business days. The industry calls it T+2.

Then, in May 2024, the United States, Canada and Mexico shortened the standard settlement cycle for most broker-dealer transactions to one business day after the trade date — T+1. As a Schwab education piece puts it, for many ordinary investors that change had little or no noticeable impact. For the people running the plumbing behind the scenes, it was a different story. And quietly, one of the busiest bits of that plumbing involves currencies.

Why Are There Currencies in a Stock Trade?

Here is the part that surprises people. If a fund in Tokyo buys a US stock, the fund is ultimately paying in dollars, even though its accounts hold yen. So behind almost every cross-border securities trade sits an FX trade — a currency exchange that has to settle in time for the securities leg to settle too. As Citi's analysis of the European transition notes, once T+1 arrives in Europe, firms will have 83% less time to carry out their post-trade operations. The currency trade is no longer a background chore. It's on the critical path.

Meet "Herstatt Risk" — the Thing PvP Was Built to Fix

FX settlement risk is the risk that one party to a currency trade delivers the currency it owes, but the other party fails to deliver the currency it owes in return. The name people still use comes from a 1974 episode: when German authorities put Bankhaus Herstatt into liquidation mid-afternoon Frankfurt time, its counterparties had already paid out Deutsche marks but never received the dollars they were owed. That day effectively gave this risk its nickname — Herstatt risk.

The main fix is payment versus payment, or PvP. In a PvP arrangement, the final payment of one currency happens if, and only if, the final payment of the other currency happens. Both legs move together, or neither moves. The largest PvP system is CLSSettlement, which handles 18 major currencies. Where PvP works, FX settlement risk is eliminated.

The trouble is that PvP isn't everywhere. According to the BIS 2025 Triennial Survey, about $5.2 trillion — 36% of average daily settlement in April 2025 — went through PvP. Another $7.6 trillion, or 54%, used methods that reduce but don't remove the risk, such as pre-settlement netting, which offsets matching trades into a smaller net amount. And more than $1.4 trillion, roughly 10%, settled on a gross bilateral basis — meaning the full trade value was exposed.

Now here's the number that links the two stories. Among trades settling gross, the third most common reason was that the trade type wasn't eligible for PvP systems at all. PvP systems are generally built for T+1 or T+2 settlement, with fixed daily cutoffs for submitting instructions. Those cutoffs mean same-day trades — T+0 — can't currently go through PvP. The BIS report says it plainly: as more jurisdictions move to T+1 for securities, demand for same-day FX swaps to fund cross-border securities transactions may increase, which may in turn lead to more trades settling on a gross bilateral basis.

The Netting Squeeze and the Cost Question

There's a second, gentler pressure point: netting. Under T+2, a firm could spend the day collecting its currency obligations, offset the ones that matched, and fund only the difference. That habit is harder under a compressed cycle. Citi's note describes what happened in North America: investors began executing FX trades gross during the day rather than waiting to net, and FX costs rose by around 4 to 5 basis points after T+1. That figure is one firm's observation of one market's experience — not a forecast for anyone else — but it illustrates why funding mechanics matter as much as settlement mechanics.

Firms have choices, and each has trade-offs. Some pre-fund settlement activity, which sidesteps intraday execution pressure but leaves long balances and weighs on portfolio performance. Others automate everything front to back — a central recommendation of the EU T+1 Industry Committee — and test the plumbing before the deadline rather than after. Others outsource FX execution to specialist providers or use custodians' automated currency services and intraday credit lines.

Europe's Turn, and Why It's Bigger

Europe — the EU, EEA, UK and Switzerland — is working toward an aligned move to T+1 on 11 October 2027. Citi expects this to have an even greater impact on FX processes than the North American rollout, partly because Europe isn't one market: it spans 32 regulators, roughly 40 central securities depositories and 11 national currencies. And not all of those currencies are CLS-eligible. When a currency pair isn't eligible for PvP, the tools available shrink considerably, leaving firms with bilateral settlement and counterparty exposure they'd rather not carry.

Timing adds another wrinkle. Some currencies are most liquid near their local market open, so trading them late in a compressed window can be costly. Investors in Asia face the tightest squeeze, since the European day begins as theirs ends. Industry guidance issued around the EU roadmap also flags that the transition could push more repo activity into same-day settlement, straining intraday liquidity and reducing netting opportunities — which is why a "gating event" has been designed to synchronise settlement late in the morning and preserve some of that netting efficiency. It's a mouthful of a term for a simple idea: give everyone a shared, predictable moment to settle together, rather than a frantic drip-feed across the day.

What This Means for You

If you're a long-term investor buying a fund, none of this is likely to touch your account directly. If you trade actively across borders, the practical difference is mainly about cash being in the right place sooner. Some brokerage firms already require funds in cash accounts before a purchase; if you're moving money in by bank transfer, the funds need to arrive by the settlement date, not simply be initiated on the trade date.

Two honest caveats. First, settlement cycles, rules and market practices differ by jurisdiction, and timelines can shift — the October 2027 European date is a plan, not a promise. Second, nothing here is a recommendation about how you or any firm should fund anything. The cost figures cited are observations from specific markets, not predictions. What's genuinely useful to understand is the chain: faster securities settlement compresses the window for the currency trade behind it, PvP handles most of that volume but not all of it, and the gaps are where funding costs and operational risk quietly accumulate.

Fifty years after Herstatt, the plumbing is far better than it was. It's also carrying far more water — global FX turnover reached $9.6 trillion a day in April 2025. Faster cycles don't remove the old risk; they just leave less room to be slow about managing it.