Significant MMT deficit spending causes skyrocketing inflation, which decimates the value of the U.S. dollar and causes panic selling of treasury bonds – hamstrings U.S. dollar hegemony.

What does this German experience have to do with the U.S. and with Modern Monetary Theory (MMT)? While there is no direct applicability to the U.S. yet, there are certain parallels which need to be explored, namely, the enormous increase in federal deficit spending over the past two decades and the Fed’s huge expansion of the money supply. In 2000, total U.S. federal debt was $5.7 trillion. Currently it exceeds $27 trillion. The chart below chronicles the growth in the U.S. federal debt since 2007

The total national debt (including the debt owed to government agencies like Social Security) roughly doubled from $5 trillion to $10 trillion during the George W. Bush administration, and it doubled again during the eight years of the Barack Obama administration. And in fiscal 2020, the stimulus spending stemming from the lockdown of the economy due to COVID-19 resulted in the largest deficit in U.S. history — $3.1 trillion. The chart below shows the deficit as a percentage of GDP going back to the first year of the Financial Panic of 2007-2009:

The U.S. has followed the path of most other developed nations over the past several decades, financing the budget deficit through the issuance of government bonds. As the chart on the next page shows, total federal debt as a percentage of GDP is now at an all-time high — even higher than after financing the enormous cost of World War II and the Korean War:

Rapid Growth in the Money Supply but Negligible Inflation

Those of us who lived through the 1970s remember when the U.S. inflation rate went into double digits in late 1979 and 1980. To crush inflationary expectations, Federal Reserve President Paul Volcker brought the Fed Funds rate to almost 20%. Interest rates for residential mortgages reached 14%. Most investors sat at the feet of Milton Friedman and learned the lesson quoted at the beginning of this commentary: “Inflation is always and everywhere a monetary phenomenon.” Thus, the medicine applied by Volcker was to restrict the growth of the money supply, which caused the highest rate of unemployment in the U.S. since the Great Depression, but ultimately was successful in lowering the inflation rate to the historical level in the U.S. of approximately 3%.

But now the traditional rules don’t seem to apply. The remarkable monetary expansion effected by central banks in the developed world over the past decade has not caused an increase in inflation. Milton Friedman’s dictum about inflation always being caused by excessive growth in the money supply seems totally irrelevant in the recent past. The Federal Reserve Bank’s reaction to the COVID-19 pandemic has been twofold: First, it has increased the money supply (M2) more than 20% year-overyear — the fastest growth since 1980 when this metric began to be tracked. Second, the Federal Reserve Bank has increased its balance sheet from $4 trillion to $7 trillion by a vast bond-buying program, purchasing primarily U.S. government debt and mortgage-backed securities. Yet U.S. inflation as measured by the CPI is anemic — approximately 1.5%. The same is true in Europe and Japan. In fact, their central banks have been seeking without success to increase the inflation rate in their countries to 2% — a level at which economies allegedly function best. Yet inflation remains stubbornly stuck between .5% and 1.5%. Even more noteworthy, $18 trillion in sovereign debt issued by Japan and European countries is currently trading at negative yields. At present, the 10-year U.S. Treasury note yields approximately 1%, and with inflation in the U.S. running at around 1.2%, this translates into a -.2% negative real yield in this instrument.

Clearly we do not understand inflation in the modern era. Economists rightly point to the remarkable drop in the velocity of money in the U.S. in 2020, which explains to some extent the absence of inflation. In simple terms, the velocity of money measures the number of times a dollar is spent to buy domestically-produced goods and services per unit of time. An example of the dramatic increase in the velocity of money was the hyperinflation in Germany, when money was spent the same day it was received because the value of the Mark dropped during the day. Additionally, the savings rate in the U.S. has increased significantly, doubling to 12.9% in November 2020 compared with a year ago. These trends help explain the absence of inflation, but they do not solve the conundrum of why huge deficit spending and massive increases in the money supply have not caused an increase in inflation. Instead, the global economy seems caught in a deflationary spiral, leading to trillions of dollars of negative yielding sovereign debt.

Enter Modern Monetary Theory

Modern Monetary Theory (MMT) was developed by an American economist named Warren Mosler, who worked as a trader and later formed his own hedge fund. He and his clients made $100 million in profits in the early 1990s by buying lira-denominated bonds, betting that Italy would not default on its lira-denominated sovereign debt. Mosler believed that, as the lira was a fiat currency (not backed by gold or other assets), a default by Italy was a political decision, not an economic decision, and that Italy would not default. This turned out to be the right call.

Over the past two decades, Mosler shared his theory with other economists, and MMT has been embraced by a number of them, including Stephanie Kelton, an economics professor at Stony Brook University and economic advisor to Bernie Sanders’ presidential campaign in 2016. At Bradley, Foster & Sargent there are no economic professors in residence, and in this commentary, we want to be clear that after studying MMT for some time, we are still not experts at how MMT works. But we will attempt to describe the major takeaways and policies which MMTers prescribe:

President Nixon in August, 1971 declared that the U.S. dollar was no longer convertible into gold. Since then, the U.S. dollar, although still the world’s major reserve currency, has been a fiat currency. This means that the currency is not backed by any kind of asset — only by faith in the government. Accordingly, the government can print as many dollars as it deems fit.

MMT proposes that a country with its own fiat currency such as the U.S. does not need to pay attention to the total amount of its debt, as it can always pay the interest on the debt and refinance maturing debt by printing more money.

The only constraint on deficit financing is inflation, which can occur when the private and public sectors spend too much at the same time.

Inflation will generally only occur when there is too much money in relation to adequate resources — workers, products, services, commodities, etc.

MMT rejects the approach of guiding economies by raising and lowering interest rates. Economic decisions should largely be made around government spending and taxation. A central bank should do the bidding of its treasury. Thus, when the treasury needs more money, the central bank should simply create it by crediting the treasury’s account.

Potential Problems with MMT MMTers

MMTers opine that governments should not be treated like households, which have to match revenues and expenses. MMTers maintain that governments control their own fiat currencies and therefore can pay their liabilities in their own currency, which they can print as they wish. Accordingly, governments do not need to budget as households or companies do, because they can meet all their obligations by simply printing money. And this, of course, is true. Problems, however, occur when government spending decisions lead printing presses to get out of control, as has happened in Weimar Germany, Argentina and many other Latin American countries, and the Zimbabwes of the world. So if the government simply instructs the central bank to print money whenever it needs it and in quantities beyond what the economy can absorb, one would expect inflation to rear its ugly head — often with catastrophic political and social consequences as in the Weimar Republic, which ushered in the Nazis.

The debasement of the currency also has ramifications on the foreign exchange market. If a country’s central bank prints too much money, it will lead to the devaluation of the currency on the foreign exchange markets. This, too, has many negative consequences, not the least of which is that if imports of goods and services cost more, prices will rise, causing inflation to accelerate. For the U.S., the devaluation of the U.S. dollar would have much more serious consequences. The U.S. dollar is the world’s major reserve currency, and U.S. Treasury obligations are held as reserves in central banks worldwide. A significant dollar devaluation would cause these banks, as well as other foreign institutions and corporations, to dump their U.S. Treasury holdings. The dollar dropped over 6% in 2020, and there is perhaps more to come. Currently, $7 trillion of U.S. government obligations are held by foreigners, and panic-selling to exchange these bonds for other currencies would cause enormous downward pressure on the dollar, debasing it even further. This would have potentially disastrous ramifications in the world’s capital markets.