The central bank's intervention in the capital market allows for more projects to be undertaken because of the distortion of prices that causes investors to miscalculate, but the central bank's intervention cannot increase the amount of actual capital available. So these extra projects are not completed and become an unnecessary waste of capital. The suspension of these projects at the same time causes a rise in unemployment across the economy. This economy-wide simultaneous failure of overextended businesses is what is referred to as a recession.
