How Far Can LT Bond Yields Rise?

Long-term bond yields have been constantly testing new highs globally in the past two years (after finding a low following the Covid-19 shock) as inflationary pressures have been surging, particularly in recent months. While EM central banks (particularly Latam/CEEMEA ex-Turkey) have been hiking aggressively in the past year to tame inflation and limit the downside risk on the local currency, DM central banks have kept interest rates low in order to keep financial conditions as loose as possible to stimulate the economic recovery.

As the Ukraine war combined with the global supply chain disruptions (amid China renewed lockdown policies) will add on to the already existing inflationary pressures, DM central banks are likely to accelerate the tightening process this year, increasing the recession risk (particularly in Europe).  The expected aggressive tightening by DM central banks is likely to lead to new highs in LT yields, questioning investors on how far LT bond yields can rise without ‘breaking’ the market.

Figure 1 represents the history of interest rates since the beginning of the 12th century up to today. The data source comes from Homer and Sylla’s book A History of Interest Rates (2005), which reviews interest rate trends in the major economies over four millennia of economic history. For the last 150 years, we compute a GDP-weighted average interest rate times series using a sample of 17 countries (Global LT interest Rate), using data from Jorda et al. paper The Rate of Return on Everything (2017).

Our global measure of LT bond yields is already up 112bps this year to 2.12%, and the historical average of LT bond yields stand between 4 and 5 percent (looking at hundreds of years of data). Will LT interest rates retrace towards their historical mean, or will the ‘deflationary forces’ win again?

Figure 1. A History of Interest Rates

Source: Homer and Sylla, Jorda et al. (2017), Bloomberg, RR calculations

Great Chart: SP500 vs. US 2Y10Y Yield Curve

Historically, research has shown that the difference between long-term and short-term interest rates (‘Yield Curve’ or ‘Time Spread’) has shown some significant negative relationship with subsequent real economic activity in the United States, with a lead of about four to six quarters. Hence, with the current low levels of the US yield curves (2Y10Y or 5Y30Y), we chose today this week to overlay the 2Y10Y yield curve with the SP500.

If we say that low yield curves tend to predict recessions, then the question now relies on quantifying a low level of the yield curve. We hear from many analysts that the current levels are very low, however if we look back at 40 years of data, the US yield curve levels are not that far away from their long-term averages. For instance, the 2Y10Y and 5Y30Y slopes are currently trading at 51bps and 53bps, while their LT averages stand at 95bps and 82bps, respectively (see here). One main reason why yield curves have been crashing over the past few months is mainly due to an increase in the front-end of the US curve on a back of a shift in expectations of monetary policy. The US 2Y interest rate is now trading at 1.96%, its highest level since September 2008. On the other hand, the 10Y yield stands at 2.46%, has been ranging between 2% and 2.6% over the past year and is up 110bps from its historical low of 1.36% reached in July 2016.

The chart below shows the importance that even if the yield curve turns negative in the US, the equity market has still upside potential in the following months. In our first observation, the 2Y10Y time spread went negative in February 2000, while the SP500 continued its rally and reached a peak in September the same year. In the second one, the yield curve inverted in June 2006 (if we ignore the Jan-Mar 2006 episode) while equities continued to rise for more than a year, peaked in October 2007, and the US plunged into the Great Depression in December 2007.

We don’t think that the current levels of the yield curves are actually alarming for the US economy and we may see a potential floor in the first quarter of this year as we believe that market participants’ (over)excitement on the Fed potential hikes will ease in the medium term. The probability of 4 or more hikes has soared to 12.1%, which pushed the front end of the US curve on the upside and explains the sharp flattening we saw in 2017 (from 1.27% to 0.5%). However, if we look at the EuroDollar futures market, the December 2018 contract currently trades at 97.81, suggesting that investors are pricing in a ST interest rate of 2.19% by the end of the year (see here). This analysis also confirms our bearish view on the US Dollar for 2018 (especially against the Euro).

Chart: SP500 (yellow, rhs) vs. US 2Y10Y Yield Curve (Source: Reuters Eikon)

Yield Curve.PNG