The money-form of value itself suffers from structural deficiencies or internal contradictions. For to be value for itself, to “actualise the concept of value in autonomous form”, the money-form of value cannot merely mediate between commodities in their exchange. But if, on the other hand, it is withdrawn from circulation and hoarded, it loses its character as value, and it becomes a mere “metal dump”. This contradiction brings about the emergence of a new form of value which no longer plays the subordinate role of merely mediating between commodities (as in the figure C-M-C), but instead makes itself the object of its immersion in circulation — or the end, the purpose, the telos of circulation as represented by the figure M-C-M´. This inversion generates the capital-form of value. In Hegelian terminology, we have now arrived at value in and for itself: value which takes itself as its own end.
The capital-form of value, self-valorising value, however, is unable to actualise itself in the sphere of circulation where the exchange of equivalents obtains; it is driven by this internal contradiction to externalise itself in the material world of production, where surplus value can be generated through the exploitation of labour-power. This movement of subsumption of production under the value form posits (abstract) labour as the substance of value.