Investing in the bond market has been a tough slog over the last few years. Zero percent policyย rates and bond buying by the worldโ€™s major central banks has kept yields at some of the lowest levels on record. Investors have long had an aversion to the bond market. Bonds donโ€™t offer the glamour and hope that many crave from their investments. And bonds donโ€™t provide the kind of long-term upside that stocks can. Add todayโ€™s ultra-low yields to the investing publicโ€™s natural bias against bonds, and the result is a move by some investors toย load up on stocks in an effort to boost income.

Higher yields are indeed available in the stock market, but you donโ€™t buy bonds solely for income.ย  Bonds give you the courage to own stocks. They are also a powerful counterbalancer.ย  When stocks fall, bonds often rise. For retired investors drawing an income from their portfolio, bonds provide a necessary stabilizer.

The chart below shows the performance of bonds in every calendar year the stock market has been down. In 13 of the 14 years that the S&P 500 has been down since 1950, intermediate-term government bonds advanced. Thatโ€™s a .929 batting average. And in the only exception year, intermediate-term government bonds were down a scant 0.74%.

We havenโ€™t seen a calendar down year for the stock market since 2008, but the last two bars on our chart show the performance of the S&P 500 from its May 2015 high through today. From its May 2015 high, the S&P 500 is down about 2% and as you would expect, intermediate-term government bonds advancedโ€”4.4%.

Despite todayโ€™s painfully low yields, bonds remain a necessary component of a well-diversified portfolio and especially a well-diversified retirement portfolio.ย Counterbalanced