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A Multi-Asset Index Approach to Inflation

Protecting a portfolio from a thief in the night

To many investors, inflation is a concept from the history books, complete with grainy images of 1970s’ gas lines or Weimar-era Germans carting marks in wheelbarrows. The U.S. has now seen 30 years of low inflation. The last time the annual inflation rate exceeded 4%, George H.W. Bush was president.

We can all use reminding that inflation represents a fundamental investment risk. Erosion of pricing power undermines living standards and is especially determinantal to retirees living off savings. For good reason, William McChesney Martin, a long-serving chairman of the Federal Reserve, anthropomorphized inflation as a “thief in the night.”

With the Consumer Price Index having jumped 5% year on year in both May and June 2021, the specter of inflation now looms larger than it has for years. As the global economy recovers from the coronavirus pandemic, a confluence of factors is driving prices up—including rising consumer demand, monetary and fiscal stimulus, tight labor markets, and supply chain shocks. Fears are growing that inflation will force an end to the low interest rates that have supported asset prices for decades.

Whether 2021’s inflation is transitory or lasting remains to be seen. Regardless, inflation protection can be a useful portfolio allocation, as argued in recent research from Morningstar Indexes. Not only is there diversification benefit to inflation hedging, but diversification among inflation hedges is sensible.

Inflation-Hedging a Portfolio

Many investors today hold portfolios light on inflation hedges. The composition of the stock market has changed dramatically over the past 10 years, with technology representing roughly one quarter of U.S. equity market value at the end of 2020, up from less than 18% in 2010. Meanwhile, the energy sector fell from 11.3% of market weight in 2010 to just 2.1% in 2020, while basic materials went from 4% to 2.4%. Owners of broad equity market portfolios are skewed toward growth stocks, whose long-duration earnings are devalued during inflationary environments.

Morningstar U.S. Market Index Sector Weights Over Time enter image description here Source: Morningstar Indexes.

Traditional asset classes have a mixed record during inflationary periods. According to Morningstar’s John Rekenthaler, stocks, bonds, and cash all had negative real (after-inflation) returns during the raging inflation of the 1970s. Commodities, including gold, were the best performers that decade, while Real Estate Investment Trusts, or REITs, were slightly ahead of the inflation rate. Real assets, including commodities, property, and infrastructure, are considered inflation hedges, because they are linked to tangible assets that possess intrinsic value. In inflationary periods, inelastic demand means that consumers absorb commodity price increases. Property prices and rents tend to rise at rates that track or exceed inflation while benefitting from surging demand in periods of economic growth. Bridges, toll roads, and utilities provide essential services and carry pricing often linked to inflation by regulation.

Then there are bonds. Treasury Inflation-Protected Securities tie returns to the U.S. Consumer Price Index. Both coupon payments and final principal are adjusted to account for inflation, thus offering investors a potentially stable real rate of return over the life of the bond.

A Multi-Asset Index Approach to Inflation

A multi-asset approach to investing in liquid real assets offers diversification. The Morningstar U.S. Real Asset Index, for example, includes:

  • TIPS
  • REITs
  • Commodities-focused equities
  • MLPs
  • Infrastructure-related equities

Multi-asset inflation protection is popular among mutual fund investors, with a variety of objective-oriented allocation funds focused on goals like real returns, real asset income, and inflation response. According to Morningstar manager research, such strategies must balance diversification among inflation hedges with thoughtful portfolio construction that doesn’t lead to over-diversification.

Liquid versions of real assets are not perfect proxies, but they boast other advantages. Equities linked to commodities, property, or infrastructure assets are easily bought and sold. They don’t require large outlays and diversified baskets are easily assembled. Commodity-related equities allow investors to avoid futures-market pitfalls that cause many products linked to commodity indexes to experience lower returns than the percentage changes in spot prices. Unlike physical commodities, they don’t require storage. REIT investors avoid all the management responsibilities of owning physical property.

Today’s Inflation as Long-Term Opportunity

Inflation is caused by a confluence of factors that are not completely understood. Labor markets, government spending, the money supply, household spending power, and markets for commodities and other goods can all drive price increases. Expectations matter, too. Then there are mitigating forces. Technology and globalization were both credited for keeping inflation low in the 1990s. Demography is another factor—Japan’s deflation has been attributed to its aging population. Confidence in the Federal Reserve’s inflation-fighting powers can also moderate inflation expectations.

Whatever the future holds, 2021’s inflation scare gives us an opportunity to assess portfolio readiness. There’s no reason that the prolonged period of low inflation we’ve enjoyed since the 1990s will persist indefinitely. Nor is it completely clear what asset classes will best hedge inflation. It’s wise to diversify when safeguarding a portfolio from a thief in the night.

Dan Lefkovitz is a strategist for Morningstar's Indexes group.

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