reexchange

Reexchange is the act of exchanging something again, or undertaking a second exchange, typically after an initial transaction has occurred. The term is used across disciplines rather than as a single fixed concept, serving as a generic label for processes in which terms, ownership, or inventory are adjusted through a subsequent exchange.

In economics and finance, reexchange describes subsequent trades, portfolio realignments, or adjustments to previously agreed terms. It can involve currency, commodities, or securities as parties revise positions, correct balances, or roll contracts forward after market changes or settlement discrepancies.

In chemistry and geochemistry, reexchange commonly denotes isotopic exchange, where isotopes of an element are exchanged between substances until isotopic equilibrium is reached. Isotopic reexchange is used to investigate reaction mechanisms, rate processes, and environmental cycling of elements.

In social exchange theory, reexchange refers to repeated reciprocal interactions among the same actors, contributing to trust, social capital, and long-term collaboration through ongoing cycles of giving and taking.

The term also appears in logistics, information systems, and related fields to describe repeated swapping or rerouting to correct errors, update records, or revalidate settlements. Because reexchange is not a uniquely defined concept, its precise meaning depends on the context and discipline involved.

See also: exchange, isotopic exchange, social exchange theory, contract rollover.