Why the 7% Stock Return Rule Doesn't Work From Here
Andrew Davis
Founder, Equity Check
On this page
- Why is the 7% return rule misleading today?
- What is CAPE (the Shiller P/E ratio)?
- What should investors expect from stocks over the next 10-15 years?
- Has the stock market been this expensive before, and what happened next?
- What other risks are stacking against index funds?
- What is the S&P 500's concentration risk?
- How does U.S. federal debt affect stock returns?
- What should investors do about it?
Why is the 7% return rule misleading today?
You've probably heard from a financial planner, or seen in your own research, that long-run passive equity returns average around 7% after inflation. Historically true. Going forward, misleading.
The reason is starting price.
The 7% average includes investors who bought stocks at CAPE 10, CAPE 15, CAPE 22. Today's CAPE sits near 40, the second-highest reading in the index's history — only the March 2000 dot-com peak, at roughly 44, was higher. The next-closest comparisons are late 1999 and the 2021 peak, both of which were followed by extended stretches of flat-to-negative real returns.
Not "below historical." Near zero, or worse.
The long-run average CAPE for the S&P 500 since 1881 is around 17. Right now it's near 40. Investors today are paying roughly two and a half times as much for a dollar of long-run earnings as they have historically.
What is CAPE (the Shiller P/E ratio)?
CAPE = Cyclically Adjusted Price-to-Earnings ratio. Also called the Shiller P/E, after Robert Shiller, the Yale economist who popularized it and won a Nobel Prize partly for this work.
A regular P/E ratio compares the current stock price to the last year's earnings.
The problem: earnings swing wildly year to year, especially through recessions and booms. A regular P/E can look cheap right before a crash (because earnings spiked) or expensive right at a bottom (because earnings collapsed).
CAPE fixes this by using 10 years of inflation-adjusted earnings instead of one. You take the current price of the S&P 500, divide it by the average real earnings over the past 10 years. That smooths out the cycle and tells you whether stocks are expensive or cheap relative to their long-run earning power.
What should investors expect from stocks over the next 10-15 years?
Dividend yield roughly 1%. Real earnings growth historically 2-3%. Valuation reversion from current levels is a 3-4% annual headwind over a decade.
Add it up. Realistic real returns from passive S&P exposure land at 0-3% per year over the next 10-15 years.
Has the stock market been this expensive before, and what happened next?
1966-1982: S&P down roughly 60% in real terms.
2000-2013: 13 years to recover the prior peak in nominal terms.
Japan 1989-2024: 35 years.
What other risks are stacking against index funds?
What is the S&P 500's concentration risk?
The Magnificent 7 represent roughly 35% of S&P 500 weight. The "passive" S&P is now an active bet on AI capex paying off. If hyperscaler spending doesn't generate proportional revenue, the whole index is exposed.
How does U.S. federal debt affect stock returns?
The federal government carries $39 trillion in debt. Public debt crossed 100% of GDP in April 2026. Net interest payments are on pace to exceed $1 trillion this fiscal year — more than defense, more than Medicaid, and trailing only Social Security. This debt leaves the government less able to spend its way out of a crisis, potentially prolonging or deepening future recessions.
What should investors do about it?
In light of this, the question is not whether to invest, but what to invest in.
Three filters worth applying:
- Value. Starting price is destiny.
- Structurally benefits from inflation.
- Non-negotiable demand. Holds up in booms and busts.
Frequently Asked Questions
Why is the historical 7% real return assumption misleading for stocks today?
The 7% figure is a long-run average that includes decades starting from much cheaper valuations. Forward returns are driven heavily by starting price, and today's starting price — a Shiller CAPE near 40 — is near the most expensive levels in market history. Historically, starting points this expensive have produced forward 10-year real returns near zero or negative, not 7%.
What is CAPE, or the Shiller P/E ratio?
CAPE (Cyclically Adjusted Price-to-Earnings ratio), also called the Shiller P/E, divides the S&P 500's price by the average of its inflation-adjusted earnings over the past 10 years instead of just the last 12 months. Developed by Nobel laureate Robert Shiller, it smooths out earnings swings from recessions and booms, giving a clearer read on whether stocks are expensive relative to their long-run earning power.
What real returns should investors expect from U.S. stocks over the next 10-15 years?
Adding a roughly 1% dividend yield, 2-3% historical real earnings growth, and a 3-4% annual headwind from valuation reversion points to realistic real returns of 0-3% per year over the next 10-15 years — well below the often-cited 7% historical average.
Has the U.S. stock market been this expensive before, and what happened next?
Yes, twice: the 1929 peak and the 2000 dot-com peak, plus a milder echo in 2021. From 1966 to 1982, the S&P 500 lost roughly 60% in real terms. After the 2000 peak, it took 13 years to recover in nominal terms. Japan's Nikkei took 35 years, from 1989 to 2024, to reclaim its prior high.
How concentrated is the S&P 500 in a handful of stocks?
The Magnificent 7 make up roughly 35% of the S&P 500's total weight, meaning a passive S&P index investment is increasingly a concentrated bet on a small group of AI-linked companies rather than a broadly diversified holding.
How does the U.S. national debt affect future stock returns?
The federal government carries $39 trillion in debt, and public debt crossed 100% of GDP in April 2026. Net interest payments are on pace to exceed $1 trillion this fiscal year, more than the government spends on defense or Medicaid, and second only to Social Security. High and rising debt service leaves less fiscal room to respond to future downturns, which can deepen or prolong recessions.
- Shiller CAPE
- S&P 500 Valuation
- Stock Market Returns
- Market Analysis
