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Repair Windows errors before they cause bigger problemsFix Now →Scan for outdated or missing drivers - takes under a minuteDriver Scan →The S&P 500 could keep rising while earnings growth slows because stock prices depend not just on how quickly profits are growing, but also on what investors expect and how much they are willing to pay for those profits. Earnings can still increase at a slower rate; a higher valuation multiple or lower required return can also lift prices. None of those forces guarantees a rally: if results disappoint against expectations, yields rise for damaging reasons, or valuations contract, the index can fall.
What does “earnings growth slows” actually mean?
A slower growth rate is not the same as falling earnings. If company earnings rise from $100 to $110, growth is 10%; if they then rise to $115.50, growth has slowed to 5%, but earnings are still increasing. A market can rise during that deceleration if investors expected an even sharper slowdown or if other factors support prices.
Expectations matter because prices reflect anticipated future cash flows, not just the latest reported growth rate. If investors had expected a 3% increase and companies deliver 5%, prices may respond positively even though growth has decelerated from an earlier period. If they expected 8%, the same 5% result may disappoint. Estimate revisions and results relative to expectations are therefore more informative than the growth-rate headline by itself.
It also helps to separate total company profit from earnings per share (EPS). EPS is profit allocated across the shares outstanding. When a company repurchases shares, the share count can fall, making EPS growth differ from growth in aggregate net income. That accounting distinction does not mean buybacks create the same increase in total corporate profits or guarantee a higher share price.
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How can stock prices rise faster than earnings?
A higher price-to-earnings multiple
A simplified way to think about an index’s price is as earnings per share multiplied by its price-to-earnings (P/E) ratio. If expected EPS rises more slowly but investors assign each dollar of expected earnings a higher multiple, the price can still advance. That is called multiple expansion.
Investors may accept a higher multiple if they become more confident about future growth, see less risk, or expect interest rates to be lower. But multiple expansion is a valuation change, not proof that underlying profits have accelerated. A higher starting valuation also leaves less room for disappointment; if expectations weaken or discount rates rise, the multiple can shrink and drag prices down.
Lower discount rates or a smaller equity risk premium
Investors value future cash flows less than cash received now, in part because of the return they could earn elsewhere and the uncertainty of owning shares. Lower discount rates can raise the present value of expected profits, particularly for companies whose expected cash flows lie further in the future. A lower equity risk premium—the extra return investors demand for taking equity risk over a safer alternative—can also support valuations.
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Neither factor is directly observable with certainty: equity-premium figures are model estimates, and different methods can produce different results. Federal Reserve Board researchers identify changes in yields, equity risk premiums, and expected dividends as channels through which Fed-related news can affect stock prices. In their May 2026 paper, Benjamin Knox and Annette Vissing-Jorgensen wrote, “The Fed’s effect on the stock market is large, even for average stock returns earned over periods of several decades.” The authors note that their research views do not necessarily indicate Board concurrence.
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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchRates do not mechanically determine market direction. A rise in yields tied to stronger real growth may coincide with better profit prospects; a rise associated with inflation, fiscal concerns, or unexpectedly tight policy can make shares less attractive without the same earnings offset. The level and speed of a rate move matter, as does its cause.
Better expectations beyond the near-term slowdown
Near-term earnings growth may slow while investors become more optimistic about later cash flows—for example, if they expect new investment to improve future productivity or monetization. That can support prices before the improvement appears in reported earnings. The reverse is also possible: strong current growth may fail to support prices if investors believe it is temporary or already reflected in valuations.
Why profits can diverge from sales
Revenue growth does not translate one-for-one into profit growth. If costs rise more slowly than sales, margins expand and earnings can grow faster than revenue. Productivity gains can contribute, though they are difficult to sustain indefinitely. Conversely, rising wages, input costs, interest expense, or taxes can squeeze margins and slow profits even when sales hold up.
A Federal Reserve Board analysis published in 2022 found that from 2004:Q4 through 2022:Q1, real sales of S&P 500 nonfinancial firms grew about 2.0% annually, while EBIT—earnings before interest and taxes—grew about 3.6% annually. The same analysis estimated annualized real net-income growth at 5.4%, compared with 3.6% after adding back both interest and tax expenses; declining interest and tax expense mechanically accounted for about one-third of profit growth over that historical interval. These are historical growth-accounting results, not a forecast that margins or lower expenses will continue to boost profits.
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The Fed analysis also measured annualized real market-capitalization growth of 5.9% for those firms over the same period, against 1.8% real GDP growth. It illustrates that market value and company profits can grow at different rates over a particular stretch, but does not establish that the gap will persist. The analysis states: “Growth in net income can only come from the following sources: (1) interest expenses can decline relative to EBIT, which in turn can only be driven by lower interest rates or by reductions in leverage; (2) effective tax rates can decline; or (3) EBIT can grow.”
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What recent S&P 500 figures do—and do not—show
Reports from 2026 describe different periods and measures. They offer context for how earnings, valuations, and index prices can move on separate tracks; they do not establish that earnings growth was already slowing across the market.
| Source and date | Reported figure | How to read it |
|---|---|---|
| J.P. Morgan Asset Management, data as of August 27, 2026 | S&P 500 revenue growth was 16% year over year; earnings growth approached 52%, or about 32% after adjusting for specified one-time investment-related gains from two large index weights. Net profit margins were near record highs, 86% of companies beat EPS expectations, and all 11 sectors had positive revenue growth. | A snapshot of a particular recent earnings season, not a full-year result or a promise that margins and growth will persist. |
| Goldman Sachs Research, September 2026 commentary | The S&P 500 forward P/E had moved from 22x at the start of 2026 to 19x in September 2026. | A dated valuation observation, not a stable estimate of fair value. The commentary discussed rates and uncertainty about earnings durability as contributors to repricing. |
| Associated Press report citing FactSet, October 6, 2026 | The S&P 500 was at a record and had gained 23% from its late-March low. Analysts expected nearly 30% year-over-year EPS growth for July–September 2026. | The earnings figure was an analyst expectation at the time, not realized growth. The report also noted high-yield and inflation risks, including the possibility of a price decline if elevated expectations were missed. |
| Vanguard commentary, September 18, 2026 | Vanguard characterized the AI complex—from hyperscalers through the broader supply chain—as roughly 40% of U.S. equity market capitalization. | A characterization of concentration, not a measure of how many companies shared equally in market gains. |
These observations should not be combined into a single earnings or breadth claim: they refer to different dates, sources, and measures. In particular, the October 6 record and strong analyst forecast show the market setting on that date, not that a slowdown had already occurred.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why the index can rise while many stocks lag
The S&P 500 is weighted by market capitalization, so the largest companies have the greatest influence on its return. A handful of very large stocks can pull the index higher even if the median stock or many smaller constituents do not rise as much. Vanguard’s September 2026 commentary described increased stock-level return dispersion beneath relatively calm index-level volatility, alongside the AI complex’s large market-cap share.
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That concentration observation is separate from J.P. Morgan Asset Management’s report that all 11 sectors had positive revenue growth in the earnings-season data through August 27, 2026. One is about market-cap distribution and return dispersion; the other is about sector revenue growth in a specific reporting period. Neither, on its own, says how every stock performed.
What could interrupt a rally?
- Earnings fall short of expectations. Prices can decline even if profits are still growing when reported results or guidance disappoint relative to what investors had priced in.
- Yields rise in a way that hurts valuations. Higher yields can make bonds more competitive and lower the present value investors assign to future profits, especially when the increase reflects inflation or unexpectedly restrictive policy rather than stronger real growth. In its October 6, 2026 report, the Associated Press wrote: “At the moment, high bond yields are making investors less willing to pay high prices for investments that aren’t bonds.” That describes the cited market context, not a universal rule.
- Margins stop expanding or compress. If costs catch up with sales, the past gap between revenue and profit growth may narrow.
- Valuations contract. If investors demand more compensation for risk or revise down expected growth, a falling P/E can offset earnings gains.
- Leadership narrows further. A market-cap-weighted index can lose support if its largest contributors weaken, even if many other companies remain sound.
How to judge whether the thesis is playing out
Track measures that distinguish profit improvement from a valuation-led or narrow rally:
- Actual and expected earnings: compare reported growth with analyst estimates and watch whether estimates are being revised up or down.
- Total net income, EPS, and share count: check whether per-share growth reflects higher aggregate profits, a lower share count, or both.
- Valuation: follow the forward P/E or earnings yield and note the date and earnings estimate used to calculate it.
- Rates and inflation: look at Treasury yields, inflation expectations, and how quickly rates are changing, rather than treating every rate rise or fall alike.
- Sales and margins: compare revenue growth with profit growth to see whether margins are widening or narrowing.
- Risk compensation: treat equity risk-premium estimates as uncertain model outputs, not directly measured facts.
- Market breadth: compare the capitalization-weighted index with equal-weight performance, the median stock, and participation across sectors.
This framework describes possible market mechanisms, not a forecast or a suitable portfolio action for any individual investor.
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