How the Roll-Down Effect Now Helps Bond Investors

Advisor Perspectives welcomes guest contributions. The views presented here do not necessarily represent those of Advisor Perspectives. This article originally appeared on the CFA Institute’s Inside Investing blog here.

The rapid selloff in the U.S. Treasury market came as a surprise to many, including such famous bond investors as Bill Gross and Jeffrey Gundlach. As the chart below shows, 10-year yields on U.S. Treasury bonds are about 130 basis points higher since the beginning of May.

Retail investors have been rapidly selling out of bond funds. That may be either wise or unwise with the benefit of hindsight, but one often-overlooked fact remains: New and existing bond investors now have the benefit of a much steeper yield curve.

In fact, the “roll-down” portion of a bond’s return is one of the most important and least understood aspects of a bond’s total return.

If we assume that the yield curve is upward sloping, as is currently the case, we can use a simple example to demonstrate a bond’s roll.

First, take a look at this chart. It shows five-year Treasury bonds with a yield of 1.69% and seven-year Treasuries with a yield of 2.31%. An investor who bought a seven-year Treasury would own a bond that yields 2.31% until its maturity.

But after two years, the bond wouldn’t be a seven-year bond. It would be a five-year bond. Because the difference in yield between the seven-year at 2.31% and five-year at 1.69% is 0.62%, the five-year yield can rise 0.62% over two years before exceeding the investor’s yield to maturity (2.31%). Therefore, we can define a bond’s roll as the amount that interest rates can rise over a specified time period before the current yield exceeds an investor’s yield to maturity (YTM).

In other words, assuming that interest rates stay the same, this positive “roll” means that the price of the bond will go up as time passes.

UST Yields