Lower Interest Rates are good

Interest rates

termpremium_Figure1Longer-term interest rates are quite low around the world. Figure 1 below shows ten-year government bond yields since 1990 for the United States, Canada, Germany, the United Kingdom, and Japan. The downward trend is clear. Moreover, further sharp declines in longer-tem yields have occurred over the past year or so. For example, in the US, ten-year Treasury yields have fallen from around 3 percent at the end of 2013, to about 2.5 percent during the summer of 2014, to around 1.9 percent today. The recent renewed decline was unexpected by most observers, including me. Why are longer-term interest rates so low? And why have they fallen even further recently, despite signs of strength in the US economy?

To explain the behavior of longer-term rates, it helps to decompose the yield on any particular bond, such as a Treasury bond issued by the US government, into three components: expected inflation, expectations about the future path of real short-term interest rates, and a term premium. At present, all three components are helping to keep longer-term interest rates low. Inflation is low and expected to remain so, so lenders are not demanding higher returns to compensate for anticipated losses in their purchasing power. Short-term interest rates are also expected to remain low, as bondholders appear pessimistic about growth prospects and the sustainable returns to capital in coming years. When short-term rates are expected to remain low, longer-term rates tend to get bid down as well.

The focus of this post, though, is on the behavior of term premiums—the third component of bond yields. Briefly, a term premium is the extra return that lenders demand to hold a longer-term bond instead of investing in a series of short-term securities (a new one-year security each year, for example). Typically, long-term yields are higher than short-term yields, implying that term premiums are usually positive (investors require extra compensation to hold longer-term bonds instead of short-term securities).

Term premiums cannot be directly observed but must be estimated from data on short-term and longer-term interest rates. Figure 2 below shows the ten-year yield on US government bonds and the associated term premium since 1961, as estimated in recent work by Tobias Adrian, Richard K. Crump, and Emanuel Moench at the Federal Reserve Bank of New York. For example, on January 2 of last year, an investor holding a ten-year Treasury bond earned a 3.2 percent yield, of which 1.6 percentage points (the estimated term premium) was the investor’s compensation for holding a longer-term security. As the figure shows, like overall yields, term premiums have generally trended down since the early 1980s.termpremium_Figure2 The figure also shows the sharp decline in both longer-term yields and term premiums over the past year or so.

So what moves term premiums? The key factors are (1) changes in the perceived riskiness of longer-term securities and (2) changes in the demand for specific securities (or classes of securities) relative to their supply.

Risk. All else equal, term premiums on longer-term securities will be higher when investors are more risk-averse and/or the perceived risk of holding those securities is high. Historically, the most important risk for long-term bondholders has been the risk of unexpected inflation. Figure 2 shows term premiums rising from very low levels in the 1960s, peaking in the late 1970s and early 1980s, and generally on a downward trend since then. Bondholders were unconcerned about inflation in the 1960s, but the high inflation of the 1970s and early 1980s increased the risk of holding longer-term bonds. Since the 1980s, inflation and inflation fears have receded steadily, and bondholders have accordingly been willing to accept less compensation for bearing inflation risk.

Uncertainty about the near-term outlook for the economy or monetary policy also raises the riskiness of bonds. Researchers have found that term premiums tend to rise in recessions; they also rise in periods in which there is greater disagreement among economic forecasters. Merrill Lynch has devised a useful, market-based measure of uncertainty about the future course of interest rates, called the MOVE index (for Merrill Lynch Option Volatility Estimate). Higher values of MOVE indicate times when traders are willing to pay more for protection against unexpected movements in interest rates. Figure 3 below, based on a second paper by Adrian, Crump, and Moench, along with Michael Abrahams, shows that the estimated term premium and the MOVE index move together, consistent with the idea that more uncertainty and risk raise term premiums. For example, MOVE increased during the “taper tantrum” episode of the summer of 2013, a period when markets became especially uncertain about prospects for monetary policy.

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As Figure 3 shows, term premiums have recently been zero or even slightly negative. That’s consistent with the fact that, in a world of low inflation and accommodative monetary policy, as we have today, holding longer-term bonds may actually reduce the overall risk of investors’ portfolios. For example, bad news about the economic outlook hurts stocks, but tends to be good for bond prices (which are inversely related to yields), as a weaker outlook implies that central banks will have to hold rates lower for longer. Bonds can also provide a hedge against the risk of deflation, since falling consumer prices increase the real value of the fixed dollar payments that bondholders receive. If longer-term bonds are a hedge against risk, then investors should be willing to accept low or even negative compensation for holding bonds rather than short-term securities.

Supply and demand for specific types of securities. In textbooks, the demand for securities depends only on their riskiness and expected return. In reality, securities may have other appealing features, such as liquidity (easy salability) or the ability to satisfy regulatory requirements. Therefore, changes in the demand for or supply of specific bonds can affect their term premiums. Treasury bonds, because of their unrivaled liquidity and safety, often attract extra investor demand in times of global economic or political upheaval. Treasuries are also often the asset of choice for foreign governments that want to hold large quantities of foreign exchange reserves.

Source: www.brookings.edu
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