s consider in more depth these phases as Kondratieff describes them. The first, up, phase typically begins with a frenetic decade of expansion, accompanied by wars and revolutions, in which new technologies that were invented in the previous downturn are suddenly standardized and rolled out. Next, a slowdown begins, caused by the reduction of capital investment, the rise of savings and the hoarding of capital by banks and industry; it is made worse by the destructive impact of wars and the growth of non-productive military expenditure. However, this slowdown is still part of the up phase: recessions remain short and shallow, while growth periods are frequent and strong.
Finally, a down phase starts, in which commodity prices and interest rates on capital both fall. There is more capital accumulated than can be invested in productive industries, so it tends to get stored inside the finance sector, depressing interest rates because the ample supply of credit depresses the price of borrowing. Recessions get worse and become more frequent. Wages and prices collapse, and finally a depression sets in.