clearing

The tap is instant; the money is not. A card payment runs on three separate clocks: authorization in about a second, clearing in overnight batches, settlement as netted bank transfers. This lesson walks the message flow, explains holds and why they linger, shows why refunds are slow when charges are fast, and follows one transaction through all three phases.

Central clearing was extended after the financial crisis because it removes counterparty risk from the network. It does not remove it from the system: it concentrates it in a small number of institutions that are now indispensable. This lesson assesses what was gained, what was created, and how to read any infrastructure change for the risk it relocates.

A CCP takes the other side of every trade, which means one member's failure becomes its problem and therefore everyone's. This lesson covers how it survives that: the margin it collects, the ordered stack of resources it burns through in a default, and the deliberate design choice of putting its own capital ahead of the mutualised fund.

A trade is agreed in microseconds and completed days later. In between, both sides hold a promise rather than an asset, and either could fail. This lesson builds the trade lifecycle, explains why the gap exists at all, and introduces the legal manoeuvre that lets a stranger's creditworthiness stop being your problem.