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Card settlement

Curated insights and technical field notes on Card settlement.

Current note

A chartered bank just put a stablecoin on card settlement

The newest published argument and its visual artifact lead the page.

Editorial posture

The first note sets the editorial contract: one dated argument, explicit tradeoffs, and visual proof close to the section it explains. More lanes appear when enough published work gives them substance.

Decision frame

Recommendation, rejected paths, and the operating proof behind the call.

Visual proof

Diagrams and original artifacts stay near the argument they explain.

Source posture

Public claims stay tied to released work or cited material.

Payments

A chartered bank just put a stablecoin on card settlement

SoFi Bank put SoFiUSD on Mastercard's settlement layer. Authorization still rides the card rails and the merchant sees nothing change, but the interbank fund movement happens on-chain, around the clock, with no batch window and no correspondent float. For the first time, issuers and acquirers get to choose their settlement medium.

Lead essay

The current Doric argument leads the index ahead of the chronological archive.

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Latest Notes

Current library

One approved argument leads the library.

The archive starts narrow by design. New Field Notes enter only when they meet the same proof, source, and visual-artifact bar.