Why Your Portfolio Can Rise While Your Real Wealth Gets Weaker

Many investors open their brokerage app, see a bigger number than before, and feel relieved. That feeling is understandable. But the first rule of serious investing is this: a higher number on a screen is not always the same as more real wealth.

Real wealth means purchasing power. In plain language, purchasing power means how much real stuff your money can buy: food, energy, housing, shares in businesses, or other assets. A portfolio can rise in dollar terms while still losing ground against things that matter in the real world. That is exactly why two investors can both say, “My account went up,” while only one of them actually became stronger.

A simple way to see this is to compare the stock market with gold. At the end of December 2021, the S&P 500 stood at 4,766.18 and spot gold was about 1,829.20 dollars per ounce. That means one unit of the S&P 500 bought about 2.61 ounces of gold. In April 2026, the S&P 500 was about 7,064.01 while spot gold was about 4,735.65 dollars per ounce. That means one unit of the S&P 500 bought only about 1.49 ounces of gold. The calculation is straightforward:

\[\begin{aligned} 4{,}766.18 \div 1{,}829.20 &\approx 2.61 \\ 7{,}064.01 \div 4{,}735.65 &\approx 1.49 \\ (1.49 \div 2.61) - 1 &\approx -42.8\%. \end{aligned}\]

In other words, the stock index rose in dollars, but it bought much less gold than before. (1, 2)

This does not mean gold is a perfect measure of the cost of living. It is not. Your supermarket bill is not literally priced in gold. But this comparison does reveal something important: measuring wealth in dollars alone can hide a real loss in relative buying power. Gold rose much faster than the stock index over that period, so an investor who only watched the stock number missed part of the real story. (1, 2)

Economists usually describe this difference with two ideas: nominal return and real return. Nominal return is the simple screen number. Real return adjusts for rising prices. The formula is:

\[\text{real return} = \frac{1 + \text{nominal return}}{1 + \text{inflation rate}} - 1\]

So if your portfolio rises by 10% but the prices of the things you buy rise by 5%, your real return is not 10%. It is:

\[\frac{1.10}{1.05} - 1 = 0.0476 \approx 4.8\%.\]

This is the difference between looking richer and being richer.

The next force is energy. Energy matters because it sits underneath almost every part of the economy. Factories need energy. Transport needs energy. Food production needs energy. Shops need lighting, heating, cooling, storage, and delivery. When energy prices jump sharply, many other prices tend to follow. Reuters reported that the Strait of Hormuz normally carries about one fifth of the world’s oil and gas supply, and that traffic through it fell to well below 10% of normal volumes in April after the conflict that began on 28 February 2026. Reuters also reported that Brent crude briefly rose above 119 dollars a barrel in March and remained far above its pre-war level. (3)

Why does that matter for an ordinary investor? Because higher oil prices can squeeze both households and businesses at the same time. Households pay more for fuel, transport, and goods delivered by road, ship, or air. Businesses pay more for production and shipping. If companies cannot pass those higher costs on to customers, profit margins shrink. If they do pass them on, households feel poorer. Either way, pressure builds. This is one reason markets can feel uncomfortable even when headline share prices still look strong. (3)

The third force is tariffs. A tariff is simply a tax placed on imported goods. It sounds technical, but the idea is simple. When a country taxes imports, someone must pay that extra cost. In many political speeches, the story is told as though the foreign seller pays. In real life, a large share of the cost is often absorbed by importers, businesses, and consumers inside the country that imposed the tariff.

The Budget Lab at Yale estimated that, as of 8 April 2026, the average effective United States tariff rate stood at 11.8%, the highest since the early 1940s. It also estimated that, depending on the policy path, the tariff regime could raise the price level by about 0.5% to 1.1% and reduce average household purchasing power by roughly 760 to 1,500 dollars in 2025 dollars. The Federal Reserve also published research showing that tariffs in 2025 gradually raised retail prices, with goods imported from China showing an 8.5% year-on-year price increase by December 2025, and at least 30% of the tariff burden being passed through to consumers for those goods. (4, 5)

Put these pieces together and the picture becomes clearer. First, the money number in a portfolio can rise while real buying power weakens. Second, an energy shock can push up costs across the whole economy. Third, tariffs can make imported goods and even some domestic goods more expensive. When all three pressures arrive close together, investors should not assume that a rising stock index means everything underneath is healthy. (1, 2, 3, 4, 5)

There is another issue as well: valuation. Valuation means how expensive shares are compared with the profits businesses actually generate. One widely watched measure is the cyclically adjusted price-to-earnings ratio. That long name means this: today’s share prices divided by average inflation-adjusted earnings from the last ten years. On 22 April 2026, that ratio was about 40.50, which is historically very high. FactSet also reported that the ordinary forward price-to-earnings ratio for the S&P 500 was 20.9 in mid-April 2026, which is above both its five-year and ten-year averages. High valuations do not tell you the exact day a market will fall. But they do tell you the market is not cheap. (6, 7)

At this point, many people make a serious mistake. They see risk, feel fear, and conclude that they must sell everything. That reaction feels sensible in the moment, but history shows it is often financially destructive. Hartford Funds notes that 76% of the stock market’s best days happened during a bear market or within the first two months of a new bull market. It also shows that missing just the 10 best days over the past 30 years would have cut returns in half. The lesson is not “ignore risk.” The lesson is “do not let fear force random timing decisions.” (8)

A more sensible response is calmer and more boring. Keep your process. Review what you own. Ask whether the businesses are strong, whether the balance sheets are healthy, whether the shares are too expensive, and whether your portfolio is too concentrated in one country, one currency, or one narrative. A good investment process does not require panic. It requires measurement.

This is also where diversification matters. Diversification simply means spreading your money so that one problem does not destroy everything at once. In 2025, broad developed markets outside the United States performed much better than many American investors expected. The MSCI EAFE index, which tracks developed markets outside the United States and Canada, returned 31.22% in 2025. By comparison, a widely used S&P 500 fund benchmark returned 17.6% in 2025. The Financial Times also reported that the broad emerging-markets benchmark rose about 28% in 2025. At the same time, valuations outside the United States were lower: as of 31 March 2026, the MSCI EAFE index showed a forward price-to-earnings ratio of 14.86, well below the S&P 500’s 20.9. (9, 10, 11, 12)

That does not prove foreign markets will beat the United States every year. Markets do not move in straight lines. But it does show that many investors became too comfortable with a single habit: owning almost everything in one expensive market and assuming that this would always be enough. It may still work for a while. But it is no longer wise to treat it as an unquestionable rule. (9, 12)

So what is the clean conclusion? A rising portfolio number can hide a weakening in real wealth. Energy shocks can spread through the economy faster than many investors realise. Tariffs can raise domestic prices even when the political slogan says someone else will pay. Expensive markets can stay expensive, but they also leave less room for disappointment. And the correct answer to this kind of environment is not panic. It is clearer measurement, stronger diversification, and a more disciplined process. (1, 2)

The screen number still matters. But it is not the whole truth. Serious investors must always ask a second question: “Compared with what?” That single question is often the difference between seeing the market and actually understanding it.

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