For Marx and many Marxists, money is based in a commodity; in Modern Monetary Theory (MMT), it is not, being based instead in a social relationship that holds more generally than just to commodity production and exchange. Even so, to the extent that commodity production and exchange are given sway within ‘modern money’ economies, operation of the Marxian ‘law of value’ appears to be compatible with MMT. It is just that, from an MMT perspective, private for-profit market-based activity will be embedded within, and delimited by, a broader social and legal framework that is – or at least can be – decisively shaped by currency-issuing government. Therefore, even though in MMT money is not regarded as a commodity, it seems that a commodity theory of money can be reconciled with MMT provided, first of all, that the connection between a money commodity and currency is understood to apply only to the sphere of commodities and, secondly, that it is legitimate to regard labor power as the ‘money commodity’. An earlier post gave some consideration to the social embeddedness of commodity production and exchange. The present focus is on the notion of labor power as money commodity. On this point, MMT can be understood as directly linking currency to labor power, which, in Marx’s theory, is reduced to the status of a commodity when subjected to the laws of commodity production and exchange. This raises the question of whether labor power can serve the role of money commodity in Marx’s theory.