Exchange
From ACT Wiki
1. Investment - trading.
A traditional exchange is an open and organised marketplace in which commodities, securities or other financial instruments are traded.
Examples include stock exchanges such as the London Stock Exchange.
2. Investment - trading - other intermediaries.
More broadly, any intermediary that facilitates a broad range of economic activities, and including intermediaries that may be less well-organised, and less secure for participants.
For example, cryptoasset exchanges.
3. Foreign currency.
Relating to transactions between different currencies.
4. Financial and commercial transactions.
Relating to a two-way flow of money or other value.
Contrasted with a one-way flow, such as a remittance.