Delivery versus payment

Delivery versus payment is the securities market’s answer to an ancient anxiety: handing something over and not getting paid. Under DvP, the transfer of the securities and the transfer of the money are made conditional on each other. The seller cannot lose the asset without receiving the cash; the buyer cannot lose the cash without receiving the asset. Whatever else goes wrong on settlement day, principal is safe.

The principle earned its formal definition after the 1987 stock market crash, when regulators asked what would happen to settlement chains if a major participant failed mid-stream. The BIS answered in 1992 with a report that defined DvP and sorted the world’s securities settlement systems into three models, a taxonomy that has organized the field ever since.

The three models

Model 1 is the purist’s version: securities and funds settle together, trade by trade, gross and final as they go. It is the securities cousin of real-time gross settlement, and like RTGS it buys its safety with liquidity, since every trade must be funded in full.

Model 2 splits the difference: securities move gross during the day, while the funds leg accumulates and settles net at the end of a cycle. Model 3 nets both legs, settling securities and funds as end-of-cycle positions. Both netted models economize on cash and collateral, and both reintroduce a wait: a participant is exposed until the cycle’s net settlement completes, which is the same bargain every netted system strikes.

What DvP does and does not fix

DvP removes principal risk, the settlement world’s worst case. It leaves the lesser risks in place: a failed trade must be replaced at current prices, and cash or securities that arrive late are a liquidity problem for whoever was counting on them. The 1992 report was careful on exactly this point, and the distinction still matters when DvP is marketed as a cure-all.

DvP is also, with its FX sibling payment versus payment, the clearest expression of a more general idea: atomic settlement, the linking of two transfers so both happen or neither does. On programmable settlement platforms the conditional link is enforced by the settlement logic itself rather than coordinated across separate systems, which is why the BIS, revisiting the subject in 2020, treated DvP achieved through atomicity as a central design goal for the next generation of market infrastructure. The goal has not changed since 1992; the enforcement is what is new. When both legs are final at the same instant, settlement finality stops being two events with a gap between them and becomes one.