Grid Trade Master Agreement

The Grid Trade Master Agreement (GTMA) is an agreement for trading electricity within the United Kingdom.{{Cite web |url=http://www.foa.co.uk/documentation/gtma/gtmajune2004.pdf |title=Archived copy |access-date=2008-10-20 |archive-url=https://web.archive.org/web/20081006081544/http://www.foa.co.uk/documentation/gtma/gtmajune2004.pdf |archive-date=2008-10-06 |url-status=dead }}

It is normally used either when a power station has excess electricity, which it wishes to "sell back" to the power grid, or when the electricity company wishes to buy surplus power to meet a surge in demand, or reduction in supply.

Although electricity is a non-tangible asset, these agreements are used in order to trade guarantees to provide power for a certain length of time.