# exchange (trade)

to give a thing and receive a thing in return

- Computed level: L15 (depth in the emergence graph, not abstraction)
- Status: review  ·  Domain: everyday  ·  Arena: exchange

## Emergence
**Emerges from:** [give](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-give.transfer), [receive](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-receive.communication), [return](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-return.movement)

**Through:** the give and the receive move things between parties, with return movement completing the cycle

**Novel properties:**
- mutual transfer
- closed cycle of possession
- reciprocal exchange

## Examples
- The 1975 Helsinki Accords included mutual recognition of borders and human rights commitments between NATO and Warsaw Pact states. *(institutions)*
- Bitcoin miners in Iceland consumed 2% of the nation's electricity in 2018 to validate transactions and earn coin rewards. *(computing)*
- A mycorrhizal fungus on pine roots in the Canadian boreal forest trades phosphorus for glucose from tree sap. *(biology)*

## Used by
- [gift](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-gift.present) (L18)
- [market](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-market.economic) (L17)
- [rental](https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-rental.economic) (L16)

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*Canonical: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-exchange.trade*  
*Structured data: https://emergencemachine.com/tools/lexicon/what-is-the-meaning-of-exchange.trade.json*  
*Every definition provably resolves to space, time, energy and pattern.*