In this chart, we look at the performance of US equities relative to Treasuries over time. As you know, price volatility differs among different asset classes; hence, in order to compare the relative performance of equities versus risk-free securities, we need to vol adjust. Using monthly times series of total returns of the Bloomberg Barclays US Aggregate Bond Index and the SP500 index, we calculate monthly returns of each asset class and then adjust our US Treasuries exposure using the 1-year realised volatility of equities. We also rebalance our portfolio every single month so that the volatility of each asset remains constant.
As you can notice, the SP500 index has lost 65% of its value relative to bonds since January 1974, with a high of 77% reached in the last quarter of 2010. Moreover, in the past two economic downturns, equities have lost 20% of their values between 1999 and 2002 and 12% of their value between 2007 and 2009. We saw last year that US 10Y nominal yield topped at 3.25% and struggled to break higher despite a nominal growth close to 6% in the United States. With yield plummeting to 2% in the past 6 months, the bond market is currently pricing in a sharp deceleration of economic activity and some practitioners are expecting rates to fall to zero percent as fear over a 2020 recession have increased dramatically. This raises the following question: should we expect Treasury bonds to significantly outperform US equities once again in the next economic downturn?
Chart. SP500 vs. US Treasuries – Total Return. Source: Bloomberg, Eikon Reuters