Settlement

In finance broadly, settlement is what makes a trade real: the moment ownership of the asset and ownership of the payment both change hands for good, closing out the obligations created when the trade was agreed. Everything before that, order matching, clearing, netting who owes what, is preparation for this final step.

Traditional markets separate execution from settlement by design. A stock bought on Monday has historically not "belonged" to the buyer until a clearinghouse processes the transfer days later; U.S. equities moved from a two-day cycle to a one-day cycle (T+1) in May 2024, and many markets outside the U.S. still settle on T+2. During that gap both sides carry counterparty risk, since cash and asset are committed but not yet exchanged, which is why clearinghouses demand margin collateral against the chance one party defaults before settlement completes.

Blockchains collapse execution and settlement into a single step. Once a transaction reaches finality, roughly six confirmations on Bitcoin, for example, the transfer is recorded on the shared ledger with no separate back-office process needed to reconcile competing records between banks. This is often called "atomic settlement": in an atomic swap or a plain wallet-to-wallet transfer, either both sides of the trade complete together or the whole transaction fails, removing the multi-day exposure window that legacy settlement carries.

Settlement speed still varies by network and by how conservatively "final" is defined, and some chains accept one confirmation while others wait longer to guard against reorganizations. Centralized exchanges complicate the picture too, since trades between users settle internally on the exchange's own books and only touch the blockchain when funds are deposited or withdrawn.