A prolonged bull market across stocks, bonds and credit has left a measure of average valuation at the highest since 1900 – and at some point this is going to translate into pain for investors, warns Goldman Sachs.
“It has seldom been the case that equities, bonds and credit have been similarly expensive at the same time, only in the Roaring 20s and the Golden 50s,” Goldman Sachs International strategists including Christian Mueller-Glissman wrote in a note this week.
“All good things must come to an end” and “there will be a bear market, eventually” they said.
As central banks cut back their monetary stimulus measures, pushing up the premiums investors demand to hold longer-dated bonds, returns are “likely to be lower across assets” over the medium term, the analysts said.
A second, less likely, scenario would involve “fast pain.” Stock and bond valuations would both get hit, with the mix depending on whether the trigger involved a negative growth shock, or a growth shock alongside an inflation pick-up.
“Elevated valuations increase the risk of draw-downs for the simple reason that there is less buffer to absorb shocks,” the strategists wrote. They said the average valuation percentile across shares, bonds and credit in the US, the world’s biggest financial market, “is 90 per cent, an all-time high.”
A portfolio of 60 per cent S&P 500 Index stocks and 40 per cent 10-year US Treasuries generated a 7.1 per cent inflation-adjusted return since 1985, Goldman calculated — compared with 4.8 per cent over the last century. The tech-bubble implosion and global financial crisis were the two taints to the record.
Low inflation has prevailed in the current period, just as it did alongside economic growth in the 1920s and 1950s, according to the Goldman report.
“The worst outcome for 60/40 portfolios is high and rising inflation, which is when both bonds and equities suffer, even outside recessions.” An increase in interest rates triggered by price pressures “remains a key risk for multi-asset portfolios. Duration risk in bond markets is much higher this cycle,” they wrote.
In the Goldman strategists’ main scenario of lower but positive returns, investors should “stay invested and could even be lured to lever up.” They suggested putting more in shares, with their greater risk-adjusted returns, and scaling back the duration of investments in fixed income.
Other findings in the report include: The exceptionally low volatility found in the stock market — with the volatility index VIX near the record low it reached in September — could continue. History has featured periods when low volatility lasted more than three years. The current one began in mid-2016.Valuations have a “mixed track record” for predicting returns, explaining less than half the variation since 1900.Major draw-downs in 60/40 portfolios over the past century amounted to 26 per cent in real terms on average, lasting 19 months. It took two years to get back to previous peaks, on average.Bonds are probably less good hedges for equities nowadays — a point also made by Pacific Investment Management Co., the world’s largest bond manager.Central banks “might not be able or willing to buffer growth or inflation shocks,” especially if they judge that imbalances and excesses are building. They also face fewer options to ease monetary policy given low rates and big balance sheets.
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