Long-term interest rates are now unsustainably low, implying bubbles inthe prices of bonds and other securities. When interest rates rise, as theysurely will, the bubbles will burst, the prices of those securities will fall,and anyone holding them will be hurt. To the extent that banks and other highlyleveraged financial institutions hold them, the bursting bubbles could causebankruptcies and financial-market breakdown.
The very low interest rate on long-term United States Treasury bonds is aclear example of the current mispricing of financial assets. A ten-yearTreasury has a nominal interest rate of less than 2%. Because theinflation rate is also about 2%, this implies a negative real interest rate,which is confirmed by the interest rate of -0.6% on ten-year Treasury InflationProtected Securities (TIPS), which adjust interest and principal payments forinflation.
Historically, the real interest rate on ten-year Treasuries hasbeen above 2%; thus, today’s rate is about two percentage points below itshistorical average. But those historical rates prevailed at times when fiscaldeficits and federal government debt were much lower than they are today. Withbudget deficits that are projected to be 5% of GDP by the end of the comingdecade, and a debt/GDP ratio that hasroughly doubled in the past five years and is continuing to grow, the realinterest rate on Treasuries should be significantly higher than it was in thepast.
The reason for today’s unsustainably low long-term rates is not a mystery.The Federal Reserve’s policy of “long-term asset purchases,” also known as“quantitative easing,” has intentionally kept long-term rates low. The Fed isbuying Treasury bonds and long-term mortgage-backed securities at a rate of $85billion a month, equivalent to an annual rate of $1,020 billion. Since thatexceeds the size of the government deficit, it implies that private markets donot need to buy any of the newly issued government debt.
The Fed has indicated that it will eventually end its program of long-termasset purchases and allow rates to rise to more normal levels. Although it hasnot indicated just when rates will rise or how high they will go, theCongressional Budget Office (CBO) projects that the rate on ten-year Treasurieswill rise above 5% by 2019 andremain above that level for the next five years.
The interest rates projected by the CBO assume that future inflation willbe only 2.2%. If inflation turns out to be higher (a very likely outcome of theFed’s recent policy), the interest rate on long-term bonds could becorrespondingly higher.
Investors are buying long-term bonds at the current low interest ratesbecause the interest rate on short-term investments is now close to zero. Inother words, buyers are getting an additional 2% current yield in exchange forassuming the risk of holding long-term bonds.
That is likely to be a money-losing strategy unless an investor issagacious or lucky enough to sell the bond before interest rates rise. If not,the loss in the price of the bond would more than wipe out the extra interest that he earned, evenif rates remain unchanged for five years.
Here is how the arithmetic works for an investor who rolls over ten-year bondsfor the next five years, thus earning 2% more each year than he would byinvesting in Treasury bills or bank deposits. Assume that the interest rate onten-year bonds remains unchanged for the next five years and then rises from 2%to 5%. During those five years, the investor earns an additional 2% each year,for a cumulative gain of 10%. But when the interest rate on a ten-year bondrises to 5%, the bond’s price falls from $100 to $69. The investor loses $31 onthe price of the bond, or three times more than he had gained in higherinterest payments.
The low interest rate on long-term Treasury bonds has also boosted demandfor other long-term assets that promise higher yields, including equities, farmland, high-yield corporate bonds, gold, and real estate. When interest ratesrise, the prices of those assets will fall as well.
The Fed has pursued its strategy of low long-term interest rates in thehope of stimulating economic activity. At this point, the extent of thestimulus seems very small, and the risk of financial bubbles is increasinglyworrying.
The US is not the only country with very low or negative real long-terminterest rates. Germany, Britain, and Japan all have similarly low long rates.And, in each of these countries, it is likely that interest rates will riseduring the next few years, imposing losses on holders of long-term bonds andpotentially impairing the stability of financial institutions.
Even if the major advanced economies’ current monetary strategies do notlead to rising inflation, we may look back on these years as a time whenofficial policy led to individual losses and overall financial instability.