The Apostle of Negative Interest Rates

Miles Kimball is a Professor at the University of Michigan, and a vocal and prolific proponent of negative interest rates. His Confessions of a Supply-Side Liberal is peppered with posts on the benefits of negative interest rates.

March 2 Even Central Bankers Need Lessons on the Transmission Mechanism for Negative Interest Rates, after words of adoration, takes the Governor of the Bank of England (Mark Carney) to task. Carney’s problem? Carney wrote recently that unless regular households face negative interest rates in their deposit accounts.. negative interest rates only work through the exchange rate channel, which is zero-sum from a global point of view.

Kimball’s argument is a little esoteric, but promotes three ideas.

First, negative interest rates central bank charge member banks on reserves should be passed onto commercial and consumer customers with larger accounts – perhaps with an exemption for smaller checking and savings accounts with, say, less than $1000.

Second, moving toward electronic money in all transactions makes administration of negative interest rates easier and more effective. In that regard, it may be necessary to tax transactions conducted in paper money, if a negative interest rate regime is in force.

Third, impacts on bank profits can be mitigated by providing subsidies to banks in the event the central bank moved into negative interest rate territory.

Fundamentally, Kimball’s view is that.. monetary policy–and full-scale negative interest rate policy in particular–is the primary answer to the problem of insufficient aggregate demand. No need to set inflation targets above zero in order to get the economy moving. Just implement sufficiently negative interest rates and things will rebound quickly.

Kimball’s vulnerability is high mathematical excellence coupled with a casual attitude toward details of actual economic institutions and arrangements.

For example, in his Carney post,  Kimball offers this rather tortured prose under the heading -“Why Wealth Effects Would Be Zero With a Representative Household” –

It is worth clarifying why the wealth effects from interest rate changes would have to be zero if everyone were identical [sic, emphasis mine]. In aggregate, the material balance condition ensures that flow of payments from human and physical capital have not only the same present value but the same time path and stochastic pattern as consumption. Thus–apart from any expansion of the production of the economy as a whole as a result of the change in monetary policy–any effect of interest rate changes on the present value of society’s assets overall is cancelled out by the effect of interest rate changes on the present value of the planned path and pattern of consumption. Of course, what is actually done will be affected by the change in interest rates, but the envelope theorem says that the wealth effects can be calculated based on flow of payments and consumption flows that were planned initially.

That’s in case you worried a regime of -2 percent negative interest rates – which Kimball endorses to bring a speedy end to economic stagnation – could collapse the life insurance industry or wipe out pension funds.

And this paragraph is troubling from another standpoint, since Kimball believes negative interest rates or “monetary policy” can trigger “expansion of the production of the economy as a whole.” So what about those wealth effects?

Indeed, later in the Carney post he writes,

..for any central bank willing to go off the paper standard, there is no limit to how low interest rates can go other than the danger of overheating the economy with too strong an economic recovery. If starting from current conditions, any country can maintain interest rates at -7% or lower for two years without overheating its economy, then I am wrong about the power of negative interest rates. But in fact, I think it will not take that much. -2% would do a great deal of good for the eurozone or Japan, and -4% for a year and a half would probably be enough to do the trick of providing more than enough aggregate demand.

At the end of the Carney post, Kimball links to a list of his and other writings on negative interest rates called How and Why to Eliminate the Zero Lower Bound: A Reader’s Guide. Worth bookmarking.

Here’s a YouTube video.

Although not completely fair, I have to say all this reminds me of a widely-quoted passage from Keynes’ General Theory –


Of course, the policy issue behind the spreading adoption of negative interest rates is that the central banks of the world are, in many countries, at the zero bound already. Thus, unless central banks can move into negative interest rate territory, governments are more or less “out of ammunition” when it comes to combatting the next recession – assuming, of course, that political alignments currently favoring austerity over infrastructure investment and so forth, are still in control.

The problem I have might be posed as one of “complexity theory.”

I myself have spent hours pouring over optimal control models of consumption  and dynamic general equilibrium. This stuff is so rarified and intellectually challenging, really, that it produces a mindset that suggests mastery of Portryagin’s maximum principle in a multi-equation setup means you have something relevant to say about real economic affairs. In fact, this may be doubtful, especially when the linkages between organizations are so complex, especially dynamically.

The problem, indeed, may be institutional but from a different angle. Economics departments in universities have, as their main consumer, business school students. So economists have to offer something different.

One would hope machine learning, Big Data, and the new predictive analytics, framed along the lines outlined by Hal Varian and others, could provide an alternative paradigm for economists – possibly rescuing them from reliance on adjusting one number in equations that are stripped of the real, concrete details of economic linkages.

Negative Interest Rates

What are we to make of negative interest rates?

Burton Malkiel (Princeton) writes in the Library of Economics and Liberty that The rate of interest measures the percentage reward a lender receives for deferring the consumption of resources until a future date. Correspondingly, it measures the price a borrower pays to have resources now.

So, in a topsy-turvy world, negative interest rates might measure the penalty a lender receives for delaying consumption of resources to some future date from a more near-term date, or from now.

This is more or less the idea of this unconventional monetary policy, now taking hold in the environs of the European and Japanese Central Banks, and possibly spreading sometime soon to your local financial institution. Thus, one of the strange features of business behavior since the Great Recession of 2008-2009 has been the hoarding of cash either in the form of retained corporate earnings or excess bank reserves.

So, in practical terms, a negative interest rate flips the relation between depositors and banks.

With negative interest rates, instead of receiving money on deposits, depositors must pay regular sums, based on the size of their deposits, to keep their money with the bank.

“If rates go negative, consumer deposit rates go to zero and PNC would charge fees on accounts.”

The Bank of Japan, the European Central Bank and several smaller European authorities have ventured into this once-uncharted territory recently.

Bloomberg QuickTake on negative interest rates

The Bank of Japan surprised markets Jan. 29 by adopting a negative interest-rate strategy. The move came 1 1/2 years after the European Central Bank became the first major central bank to venture below zero. With the fallout limited so far, policy makers are more willing to accept sub-zero rates. The ECB cut a key rate further into negative territory Dec. 3, even though President Mario Draghi earlier said it had hit the “lower bound.” It now charges banks 0.3 percent to hold their cash overnight. Sweden also has negative rates, Denmark used them to protect its currency’s peg to the euro and Switzerland moved its deposit rate below zero for the first time since the 1970s. Since central banks provide a benchmark for all borrowing costs, negative rates spread to a range of fixed-income securities. By the end of 2015, about a third of the debt issued by euro zone governments had negative yields. That means investors holding to maturity won’t get all their money back. Banks have been reluctant to pass on negative rates for fear of losing customers, though Julius Baer began to charge large depositors.

These developments have triggered significant criticism and concern in the financial community.

Japan’s Negative Interest Rates Are Even Crazier Than They Sound


The central bank buys as much as 12 trillion yen of the nation’s government debt a month…

Life insurance companies, for instance, take in premiums today and invest them to be able to cover their obligations when policyholders eventually die. They price their policies on the assumption of a mid-single-digit positive return on their bond portfolios. Turn that return negative and all of a sudden the world’s life insurers are either unprofitable or insolvent. And that’s a big industry.

Pension funds, meanwhile, operate the same way, taking in and investing contributions against future obligations. Many US pension plans are already borderline broke, and in a NIRP environment they’ll suffer a mass extinction. Again, big industry, many employees, huge potential impact on both Wall Street and Main Street.

It has to be noted, however, that real (or inflation-adjusted) interest rates have gone below zero already for certain asset classes. Thus, a highlight of the Bank of England Study on negative interest rates circa 2013 is this chart, showing the emergence of negative real interest rates.


Are these developments the canary in the mine?

We really need some theoretical analysis from the economics community – perspectives that encompass developments like the advent of China as a major player in world markets and patterns of debt expansion and servicing in the older industrial nations.