Conceivably, then, couldn’t lower interest rates produce zero malinvestments? That is, would it be logically possible that all investments selected did not eventually result in a loss? Is that simply unlikely or strictly impossible?
I think, at this point, a brief and incomplete overview of Austrian business cycle theory would be useful. The concept, at least broadly speaking, is that by increasing the supply of loanable funds (usually in the form of credit) there is an “artificial” fall in the “rate of interest”. This reduction in the rate of interest acts as a price ceiling for capital goods, especially those of higher order. Just like other price fixing schemes, this manipulation of the rate of interest creates economic chaos—in this case, intertemporal chaos in the structure of production. The aggregate supply of saved capital goods is decided by society’s time preference, and this time preference is indirectly reflected on the market (assuming a fixed supply of money, or a fixed moment in time) by the rate of interest; a falling rate of interest reflects a decreasing marginal utility for accumulated economic goods, or an increasing supply of accumulated economic goods.
This fall in the rate of interest causes entrepreneurs to borrow and invest, lengthening and widening the structure of production. How one approaches the topic of an ever-lengthening and ever-widening structure of production is paramount to understanding the full implications of Austrian capital theory, I think. Changes in the structure of production should be seen as the product of entrepreneurs knowingly embarking upon more “roundabout” processes of production. In other words, entrepreneurs do not take advantage of low rates of interest to explicitely and purposefully engage in more roundabout process of production, rather they invest in lines of production they believe are profitable. The structure of production, therefore, should be seen as the product of a dynamic process of capital allocation, based upon the actions committed to by the entrepreneurs in question. In other words, the structure of production—illustratively divided into a number of phases, each of different lengths (representing time) and widths (representing the scope of necessary capital-goods required just for the production of economic goods produced in that one phase, each of which may necessitate its own structure of production of varying lengths and widths)—should be seen as immediately disjointed but effectively interdependent (either directly or indirectly) processes of production embarked upon by entrepreneurs with various different objectives in mind.
Seeing the capital structure in this way, I think, makes it much easier to become aware of how entrepreneurial decisions are made during eras of credit booms. Knowing that the structure of production is but a matrix of different processes of production, each dependent on entrepreneurs’s rational action, we can therefore become aware of the fact that the profitability of each process of production is directly independent (they are indirectly independent in that the collapse of the structure of production due to the re-equilibration of intertemporal prices will reveal malinvestment, and the collapse of certain parts of the structure of production will lead to the collapse of others because of this interdependency). Let us take the housing market and provide a simplified example. Knowing that there is demand for housing, an entrepreneur decides to borrow artificially cheap credit in order to fund a project which will provide one hundred houses to the market. This project, of course, requires a widening of this new phase of production—the entrepreneur needs to access nails, lumber, tools, et cetera. The profitability of the nails is not immediately dependent on the profitability of the house. In other words, the entrepreneur will pay the nail producer out of accumulated capital (or savings), and therefore the nail producer will strike a profit even if ultimately the housing-project owner finds that his investment was unprofitable. Just the same, the housing-project owner may be able to sell the houses before this intertemporal misallocation of capital is revealed.
This is where DD5’s correction of my original point gains value. It is not that the lengthening of the structure of production does not lead to a rise in malinvestment—because, it will and it does—but not all individual investments made during this time will prove to be unprofitable. Therefore, there must be a distinction between the malinvestment which is represented by a general quantity of investments made along a general and partially-aggregated line of production, and then the de-aggregated and individual investments which makes up that cluster of phases of production which make up a particular sector.