So says Eric D. Nelson of Servo Wealth Management, here:
For diversified, long-term oriented investment portfolios, interest rate and bond price changes matter very little. Most of a portfolio’s volatility comes from stocks.
Interest rate cycles can last for very long periods of time which makes interest-rate forecasting almost impossible. Further, the extremes of the bond market (cash or long-term bonds) rarely make sense. Sticking with bonds of between one and five years in maturity works best. Long-term bonds sometimes produce the best returns, but this tends to coincide with periods when stocks are also doing very well, when the bond component of a diversified portfolio is needed the least.
A “variable maturity” strategy is superior to simple indexing or the “laddering” of bonds by taking advantage of current bond prices and higher-expected return environments when yields are significantly higher for longer-maturities (up to five years), while limiting interest rate risk when yields are flat or inverted across the bond market. This approach eliminates any need to forecast future interest rates, even if such a thing were possible.
