Exchange Rate

Overview

A rate is quoted as a pair with a base asset and quote asset. It may come from an executable bid or ask, a midpoint, last trade, dealer quote, reference index, or automated pricing formula.

Rates differ across venues because of liquidity, fees, region, counterparty risk, settlement access, asset form, and timing. A displayed rate may exclude spread, commission, slippage, network costs, or conversion through intermediate assets. Stale rates can misprice payments or balances.

Systems should record pair direction, source, timestamp, validity window, precision, and pricing side. Payments need clear rate-lock and expiry rules, while accounting requires consistent valuation sources. Users should compare the final received amount rather than relying on a headline rate.

These stages can use different prices, so systems should retain each rate and its effective time rather than overwrite the original commercial quote.

Controls should compare independent sources and apply age, deviation, and notional limits.

Exchange Rate can appear in the same workflow as counterparty risk and settlement, but the records should remain separately identifiable. A relationship between them does not prove that pricing, execution, settlement, custody, or accounting has completed.

The scope of Exchange Rate should preserve its defining condition: Operators should preserve bid, ask, reference price, fees, spread, quantity, execution result, and any conversion or settlement timing difference. Teams should document when that condition begins, which event changes it, and what evidence shows that execution, settlement, or measurement is complete.

Control evidence for Exchange Rate should cover pair direction, source, timestamp, order size, quoted side, fees, and realized execution. The definition also indicates that for reliable use, teams should record quoted pair or asset, direction, source, venue, observation time, quantity, bid or ask side, fees, and realized result. Keeping these details together makes later reconciliation and performance comparison possible without rewriting the original record.