IN THE OBVIOUS, common sense interpretation, the sentence 'capital moves means that capital, normally in one place, gets up and moves. British capital is exported and invested in Africa. Japanese capital moves out of Japan and flows into the United States. Capital is understood as basically fixed, but capable of motion. Capital is attached but capable of detaching itself. Thus: Volkswagen has a car factory in Puebla, but we know that it (a German company) can close its factory and move its capital elsewhere. Capital is capable of movement, but it is defined first in terms of its attachment: attachment to a company (Volkswagen), attachment to a branch of industry (the automobile industry) and attachment to a place (Puebla, Germany). Thus, following the same reasoning, capital invested in the textile industry is often referred to as 'textile capital , capital in the banking industry as 'banking capital , capital owned by Mexicans as 'Mexican capital , by US Americans as 'US capital , etc. Although the capacity of capital to move, or to detach itself from a particular owner or branch of economic activity, is never put in question, the movement of capital is secondary to its initial definition in terms of attachment or fixity.
In all of these examples, capital is treated as a thing, a thing that can be owned, a thing that is normally attached to a particular place, company, branch of economic activity; a thing that can be moved, from place to place, from company to company, from one branch of activity to another.
All this is obvious; but once we try to deprive capital of its thinghood, it becomes less obvious. Why should we try to deprive capital of its thinghood, why is the obvious analysis of the movement of capital not sufficient? The answer is surely that it depends on what we want to understand. If we want to understand capitalist development as economists, or if we want to understand the way in which capital dominates society, then there is probably no reason to question the thinghood of capital. If, however, we want to understand not the domination and reproduction of capital, but the vulnerability and rupture of capital, if, in other words, we want to understand not how capitalism works, but how it can be destroyed, then we need to open up the thinghood of capital, to break its facticity, to break the illusion/reality of 'capital is, capital moves, capital rules, that’s the way things are . That is why Marx devoted much of his life to showing that capital is not a thing but a social relation, a social relation which exists in the fetishised form of a thing.
If capital is understood as a social relation rather than a thing, then what does it mean to say that 'capital moves ? The answer is now less obvious. How can a social relation move? The movement of capital can only refer to the mobility, or perhaps better, flux or fluidity of the social relations of capitalism, the relations of power under capitalism.