Fidelity flags critical flaws in the bull market

Fidelity’s 2026 stock market outlook carries a message for anyone who feels comfortable with their portfolio right now, and it is not the usual year-end cheerleading.

Jurrien Timmer, Fidelity’s director of global macro research, believes 2026 can still bring more gains, but only if investors understand what is driving them. 

His 2026 outlook for stocks lays out critical flaws in this bull market, and each one could change how you position your money for the year ahead.

The issue is not whether stocks can climb higher, but whether the strength on paper matches the real strength of the market driving the numbers. That question sits at the heart of Fidelity’s analysis, and it has practical consequences for how you plan your exposure to U.S. equities in 2026.

Why this bull market isn’t as strong as it looks

Timmer’s headline finding sits at the center of Fidelity’s 2026 stock market outlook, an analysis any investor can read directly on the company’s website. Since the October 2022 low, the cap-weighted S&P 500 has returned roughly 91%, a figure that sounds impressive for any three-year stretch of stocks. 

Strip out the mega-cap tech stocks, however, and the equal-weighted S&P 500 has returned only 52% over that same period, Fidelity shared. Market concentration is doing most of the heavy lifting because the rally has leaned on a narrow cluster of names broadly known as the Magnificent 7. 

That concentration has lifted index-fund investors along for the ride, yet it means most stocks have delivered far weaker gains than the headline numbers suggest. If you own an S&P 500 fund, your returns lean more on Nvidia, Microsoft, and Apple than on the broader American economy, according to Fidelity.

The inflation penalty most investors forget to calculate

Inflation has eaten into the real value of this bull market, and the numbers show the real damage clearly once you adjust for inflation. The cap-weighted S&P 500 is up 73% after inflation since October 2022, compared with the 91% nominal return most investors pay attention to. 

The equal-weighted index tells a harsher story, rising just 36% in inflation-adjusted terms since the October 2022 market low, Fidelity noted. That 36% figure matters because it represents what the average stock has earned you once the cost-of-living hit since 2022 is subtracted out. 

Consumer prices outpaced many paychecks during that period, and the drag shows up directly inside real returns now, said Fidelity. The more you lean on equal-weight or small-cap funds, the more important it becomes to track real returns, not just the statement’s headline number.

How 2025 changed the engine driving stocks

RgStudio/Getty Images Something important shifted inside this bull market during 2025, and the change is a healthy development most investors should not quietly overlook. From 2022 through 2024, rising price-to-earnings ratios did most of the heavy lifting, meaning investors were paying more per dollar of corporate profit earned. 

In 2025, that dynamic flipped, and actual earnings growth became the dominant driver of market returns across the benchmark index, according to Fidelity. Historically, by year three of a bull market, earnings and valuations each contribute roughly 40% of total returns, with dividends filling the remaining 20%. 

“The cyclical bull market, now 45 months strong, has been bent but not broken… In the grand scheme of history, a 10% decline happens about every other year. One might say that’s not much, given all the bad stuff going on,” said Timmer.

That split is where the current market sits today, based on a review of past cycles and decades of historical U.S. stock market data overall. This shift matters for you because earnings-driven gains tend to be more sustainable than gains driven only by rising multiples, according to Fidelity.

The risks Fidelity says could break the rally in 2026

Fidelity’s 2026 outlook does not pretend the bull market is risk-free, and Timmer points directly at three concerns every investor should keep in clear view. The first concern is valuations, because the S&P 500 now prices in a very optimistic earnings picture with almost no room for disappointment ahead. 

If earnings growth slows from the double-digit pace Wall Street expects toward the historical 6% to 7% range, stocks could face real pressure, according to Fidelity. The second concern is market concentration, which means a handful of AI-linked mega-caps continue driving index-level returns well beyond their share of real economic output. 

If any of those names stumble on earnings, spending, or forward guidance, your passive index fund could absorb the damage faster than you might expect. Investors often assume diversification through the S&P 500, yet the top ten names have driven most of the gains since 2022, Fidelity noted. 

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More Personal Finance: The third concern is interest rates, and the 10-year Treasury yield remains a critical number to watch throughout 2026. Whenever that yield approaches 5%, stocks tend to sell off briefly because bonds start to look more attractive, and equities must reprice in response to that shift in the bond market. 

Inflation remains above the Federal Reserve‘s 2% target and has not printed at or below 2% in about five years, Fidelity explained. Policy uncertainty adds to the picture, since investors do not yet know who will replace Fed Chair Jerome Powell once his term officially ends in May. 

A new chair could push for faster rate cuts, which might run the economy hot and lift long-term yields, creating pressure on high-multiple stocks. That combination of valuation stretch, concentration, and rate risk makes up the critical flaws in the bull market heading into 2026, Fidelity added.

What Fidelity recommends you do with your portfolio

Timmer’s “game plan” for 2026 leans on a familiar idea, yet it carries more weight now than it did during the previous two market cycles. He believes investors should broaden their horizons beyond U.S. mega-caps and look more closely at international equities, commodities, and certain alternative investments. 

International stocks had a strong 2025 and, on several measures, continue to look attractive compared with the top-heavy S&P 500 index, Fidelity confirmed. 

Earnings growth outside the U.S. is now tracking better than inside the U.S., giving you compelling alternatives if you only own American large-cap index funds.  That shift is a reason to rebalance, especially if your equity has drifted heavily toward U.S. tech over the last three years.

In a Wall Street context, analyst targets for the S&P 500 vary widely as 2026 unfolds.

Where to look beyond U.S. mega-caps for real opportunity

International equities are not the only area Timmer flags; his broader analysis extends to commodities, gold, and less traditional portfolio diversifiers. He is cautious about long-term bonds in 2026 because bond prices tend to fall when interest rates rise, and yields may drift higher next year. 

Alternatives and commodities can play a diversifying role, since they tend to be less correlated with traditional stocks and U.S. bond indexes, Fidelity indicated. For most retail investors, this does not mean chasing niche products or exotic strategies, and the outlook is clear about the risks involved in those categories. 

It means asking whether your portfolio is too concentrated in U.S. tech names, and whether a simple rebalance could meaningfully lower the risk you carry. Tom Lee’s sharp warning about a possible 2026 correction echoes similar concerns about concentration and valuation in this bull market.

Practical steps investors can take in 2026

Fidelity’s outlook offers plenty of useful detail, yet translating it into actual portfolio moves is where most investors quietly stumble every single year. You do not have to predict the next Fed chair or time the peak of the AI cycle to position your portfolio for a bumpier 2026.

Investment moves worth considering

1. Check your S&P 500 fund’s top 10 holdings and note how much of your equity sits inside the Magnificent 7 on a weighted basis.
2. Add an international equity fund to your mix, because non-U.S. earnings growth has recently surpassed U.S. expectations during the last quarter, according to Fidelity.
3. Review your bond exposure with an advisor and weigh shorter-duration bonds, since long-term rates could drift higher through next year.
4. Track the 10-year Treasury yield weekly, because the 5% level acts as a pressure point for U.S. equities during major sell-offs.

How to position your portfolio now

The bull market could deliver another year of positive returns in 2026, yet the current setup is more fragile than most investors realize. Valuations, concentration, and interest-rate risk all sit inside this same bull market, and each could unwind those gains quickly this year, Fidelity said.

The practical move is to respect the rally, broaden your portfolio beyond U.S. mega-caps, and stay realistic about what headline index returns really represent. For a wider market view heading into the rest of the year, Goldman Sachs reiterated its bold S&P 500 call for 2026.

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