Negative interest rates may or may not be a thing of the past (many thought that the ECB had learned its lesson, and then Vitor Constancio wrote a blog post showing that the ECB hasn’t learned a damn thing), but the confusion about their significance remains. Here is Deutsche Bank’s Dominic Konstam explaining how, among many other things including why Europe will need to “tax” cash before this final Keynesian experiment is finally over, negative rates are merely the logical failure of globalization.
Misconceptions about negative rates
Understanding how negative rates may or may not help economic growth is much more complex than most central bankers and investors probably appreciate. Ultimately the confusion resides around differences in view on the theory of money. In a classical world, money supply multiplied by a constant velocity of circulation equates to nominal growth. In a Keynesian world, velocity is not necessarily constant – specifically for Keynes, there is a money demand function (liquidity preference) and therefore a theory of interest that allows for a liquidity trap whereby increasing money supply does not lead to higher nominal growth as the increase in money is hoarded. The interest rate (or inverse of the price of bonds) becomes sticky because at low rates, for infinitesimal expectations of any further rise in bond prices and a further fall in interest rates, demand for money tends to infinity. In Gesell’s world money supply itself becomes inversely correlated with velocity of circulation due to money characteristics being superior to goods (or commodities). There are costs to storage that money does not have and so interest on money capital sets a bar to interest on real capital that produces goods. This is similar to Keynes’ concept of the marginal efficiency of capital schedule being separate from the interest rate. For Gesell the product of money and velocity is effective demand (nominal growth) but because of money capital’s superiority to real capital, if money supply expands it comes at the expense of velocity. The new money supply is hoarded because as interest rates fall, expected returns on capital also fall through oversupply – for economic agents goods remain unattractive to money. The demand for money thus rises as velocity slows.This is simply a deflation spiral, consumers delaying purchases of goods, hoarding money, expecting further falls in goods prices before they are willing to part with their money.
