Page "Financial capital" Paragraph 87

Like money, financial instruments may be " backed " by state military fiat, credit ( i. e. social capital held by banks and their depositors ), or commodity resources.

Governments generally closely control the supply of it and usually require some " reserve " be held by institutions granting credit.

Trading between various national currency instruments is conducted on a money market.

Such trading reveals differences in probability of debt collection or store of value function of that currency, as assigned by traders.