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Worried About Inflation? Don't Change a Thing

Investors who are worried about inflation needn’t overhaul their portfolio. Here’s why.

Worried About Inflation? Don't Change a Thing
Pedestrians walk past an Hermes International store in the Shibuya district of Tokyo, Japan. (Photographer: Noriko Hayashi/Bloomberg)

Investors tend to watch inflation closely, and for good reason. The whole point of investing is to increase the value of money, so keeping pace with rising prices is crucial. But for a growing number of U.S. investors, a healthy regard for inflation has been replaced by anxiety that the U.S. is on the brink of surging prices.     

Admittedly, the current environment seems fertile for inflation. A lot of money is floating around. The Federal Reserve has injected roughly $3 trillion into the economy so far this year. Add to that the projected federal budget deficit of $3.7 trillion for 2020, according to the Congressional Budget Office, nearly triple the previous record of $1.4 trillion in 2009. Meanwhile, Covid-19 is disrupting supply chains and hastening the breakdown of global trade. The cocktail of ample cash and shrinking inventories is a recipe for higher prices.    

Worried About Inflation? Don't Change a Thing

Still, the impact on portfolios is far from clear. There are few historical examples to point to because inflation has rarely been a threat to U.S. investors. A traditional 60/40 portfolio of U.S. stocks and bonds, as represented by the S&P 500 Index and long-term government bonds, has produced a real, or net of inflation, return of 5.8% a year since 1926 through May, including dividends, the longest period for which numbers are available. It also generated a positive real return 89% of the time over rolling 10-year periods, counted monthly. 

Worried About Inflation? Don't Change a Thing

In addition, almost all the 10-year periods of negative real returns were clustered around a single decade: the notorious stagflation of the 1970s, a combination of runaway inflation and tepid economic growth that inflation hawks worry about today. Inflation, as measured by year-over-year changes in the consumer price index, began to creep up during the late 1960s. By the end of 1969, the inflation rate had swelled to 6.2%, more than three times its long-term average since 1871 at the time, according to numbers compiled by Yale professor Robert Shiller. And that was just the beginning. It would eventually climb to 15% in 1980 before finally falling to a more normal level in 1983. 

So how did the trusty 60/40 portfolio hold up against stagflation? Surprisingly well. It produced a nominal, or gross of inflation, return of 7.8% a year from 1970 to 1982, and a real return of 0.1% a year. In short, it kept up with inflation.

Worried About Inflation? Don't Change a Thing

But the more interesting and instructive bits are in the details. As it turned out, the parts didn’t contribute equally to the whole. The stocks held up well, producing a real return of 0.3% a year during the period. While it’s never safe to generalize based on a single anecdote, it makes intuitive sense that stocks might be a good inflation hedge. As University of Pennsylvania professor Jeremy Siegel noted in “Stocks for the Long Run,” his 1994 homage to the market, stocks “are claims on real assets, and real assets will rise in value with an increase in the general level of prices.” 

Notably, stocks did just that while battling two headwinds inflationistas fear, namely declining earnings and contracting valuations. Real earnings declined by 1.3% a year from 1970 to 1982, while the price-to-earnings ratio shrank 2.7% a year, based on 12-month trailing earnings. And yet, an investment in stocks held its value.

Bonds, on the other hand, weren’t so lucky. They returned a negative 0.8% a year after inflation during the period. That isn’t surprising, either. Higher inflation should result in higher interest rates, both because lenders want to be repaid in real dollars and because central bankers are likely to raise rates to tame inflation, as Fed Chair Paul Volcker did in the early 1980s. In fact, while the correlation between inflation and 10-year Treasury yields has generally been weak since 1871 (0.26), it strengthened during the period from 1970 to 1982 (0.52) as interest rates followed inflation higher. (A correlation of 1 implies that two variables move perfectly in the same direction, whereas a correlation of negative 1 implies that two variables move perfectly in the opposite direction.)

And when interest rates go up, bond prices go down. But not all bonds, and not all equally. In general, bonds with longer maturities are more vulnerable to rising rates than those with shorter maturities, and that made all the difference. While an investment in long-term government bonds eroded in value from 1970 to 1982, five-year Treasuries returned 0.8% a year after inflation and one-month Treasuries perfectly tracked the inflation rate. 

The takeaway from all this is that investors who are worried about inflation needn’t overhaul their portfolio. A simple mix of stocks and short to medium-term bonds is probably a better bet than investments widely peddled as inflation protection, such as gold, cryptocurrency, real estate or even inflation-protected Treasuries. A smattering of those investments isn’t likely to make much difference and serious investors would not put all their eggs in one of those baskets.

Those tempted to hoard gold bars until the threat passes should think twice. As probable as inflation may seem, it’s impossible to know when it will take hold, if ever. Inflation bugs have been carping for years that the fiscal and monetary stimulus unleashed after the 2008 financial crisis would stoke inflation, but it hasn’t happened despite the Fed’s repeated attempts to lift prices. Japan’s central bankers have been at it for nearly three decades, mostly without success.

Worried About Inflation? Don't Change a Thing

It’s worth noting that the bond market isn’t worried about inflation, either. The breakeven rate, or the difference between the yield on nominal and inflation-protected 10-year Treasuries, a widely followed gauge of expected inflation, is just 1.4%. While it has risen since the coronavirus-induced financial panic receded in late March, it has also trended down since 2018 and remains stubbornly below the Fed’s inflation target of 2%. People love to think that they know more than the market, and they’re almost always wrong.     

Investors are free to worry about inflation, of course. But most are likely to find that the best defense is already nestled in their portfolios.

This column does not necessarily reflect the opinion of the editorial board or Bloomberg LP and its owners.

Nir Kaissar is a Bloomberg Opinion columnist covering the markets. He is the founder of Unison Advisors, an asset management firm. He has worked as a lawyer at Sullivan & Cromwell and a consultant at Ernst & Young.

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