The stock market is flashing a massive warning sign, forcing Wall Street’s biggest bulls to change their playbooks. On September 16, 2026, prominent market strategist Ed Yardeni slashed his year-end 2026 S&P 500 target from 8,400 to 7,900, warning investors to "proceed with caution."
If you are looking at the headline index numbers, everything seems fine. The S&P 500 (.INX) is trading near all-time highs at 7,602.50. But underneath the hood, a structural shift is happening.
To understand why the market is at a crossroads—and why a hidden strategy called the "S&P 90" might be your best defense—we have to look at the economic forces breaking the market in two.
1. The 5% Gravity Well: Why Multiples Are Shrinking
The primary catalyst driving down market forecasts is the bond market. The 10-year U.S. Treasury note yield has surged past 5.0%, a level not sustained since before the 2008 Financial Crisis.
When a risk-free government bond pays 5%, equity valuations face a brutal mathematical reality called multiple compression. Historically, when risk-free rates break past 5%, investors demand a much higher premium to take on the risk of owning stocks. This forces the broader market’s price-to-earnings (P/E) multiple to contract.
Compounding this pressure is a looming stagflationary headwind: military escalations in the Middle East have driven crude oil prices above $100 a barrel, keeping inflation sticky and threatening a prolonged Federal Reserve interest rate cycle.
2. A Tale of Two Economies: The Concentration Trap
Right now, the standard, market-cap-weighted S&P 500 trades at an expensive Trailing P/E of 26.36 and a Forward P/E of 19.09. But those numbers lie. The index has become hyper-concentrated, hiding a massive divergence between the top 10 megacaps and the rest of the market:
The Top 10 Tech Giants: Growing earnings at an explosive 35% to 42% rate, funneling cash into a massive 74.6% surge in AI capital expenditures. Investors have rewarded them with an aggregate premium forward multiple above 28x.
The Other 490 Companies: Growing earnings at a muted 2% to 5% clip, with capital expenditures crawling at just 2.3%.
The entire index is effectively a concentrated bet that a handful of tech CEOs can grow their profits fast enough to outrun 5%+ interest rates. If their growth slows even slightly, the top-heavy index faces a steep drop.
3. Stripping Out the Giants: Entering the S&P 90
To find where the real value hides, institutional strategists look at the S&P 100 Index—the top 100 largest U.S. companies. As a whole, the S&P 100 trades at a rich forward P/E of 22.18, driven by the fact that the top 10 giants command a staggering 52.2% of the entire index's weight.
But what happens if you strip those top 10 giants completely out of the equation? You are left with the "S&P 90."
When you remove the top 10 megacaps (MSFT, AAPL, NVDA, AMZN, GOOGL, META, TSLA, AVGO) from the S&P 100, the index fundamentally transforms:
Forward P/E Drops to 15.42x: It instantly shifts from an expensive tech bubble into a historically fair-valued, safe-haven portfolio.
Sector Leadership Flips: Information Technology exposure collapses by two-thirds (dropping to ~14.5%). Financials (~22.5%) and Health Care (~18.5%) double in size to become the dominant forces.
Structural Inflation/Rate Defense: Financials (like JPMorgan Chase and Berkshire Hathaway) capture expanding profit margins as rates rise, while Health Care and Industrials possess inelastic real-world demand that easily passes inflationary costs down to consumers.
4. No S&P 90 ETF? The Closest Proxy Is EQWL
Because there is no official commercial "S&P 90" ETF that sets the top 10 megacaps to exactly 0% while retaining market-cap weighting for the remaining 90 stocks, how can an investor implement this concept in a real brokerage account?
The single closest ETF match available on the market is the Invesco S&P 100 Equal Weight ETF (EQWL).
How EQWL Replicates the S&P 90 Concept
EQWL takes the exact same S&P 100 universe and equal-weights all ~100 constituents (~1.0% per stock at quarterly rebalance).
By doing so, it slashes the combined weight of the top 10 megacaps from 52.2% down to ~11.9% (~1.1% each). This effectively reallocates ~88% to 90% of your portfolio directly into the remaining "S&P 90" companies.
5. Head-to-Head Stats: S&P 500 vs. S&P 90 vs. EQWL ETF
| Metric / Feature | Standard S&P 500 (SPY/VOO) | Hypothetical "S&P 90" | Invesco S&P 100 Equal Weight ETF (EQWL) |
| Index Methodology | Market-Cap Weighted (~500 constituents) | S&P 100 Cap-Weighted (Top 10 Excluded) | S&P 100 Equal-Weighted (~1.0% per stock) |
| Top 10 Weight Concentration | ~34.5% – 37.0% (Hyper-concentrated) | 0.0% (Fully Excluded) | ~11.9% (Diluted from 52.2%) |
| Forward P/E Ratio | 19.09x | 15.42x (Safe-haven value) | 18.18x |
| Trailing P/E Ratio | 26.36x | ~17.20x | 21.16x |
| Dividend Yield | ~1.25% – 1.35% | ~2.10% | ~1.64% – 1.71% |
| Info Tech Sector Weight | ~31.5% – 32.5% | ~14.5% | ~20.3% |
| Financials Sector Weight | ~13.0% | ~22.5% | ~15.7% |
| Health Care Sector Weight | ~11.8% | ~18.5% | ~15.9% |
| Expense Ratio | 0.03% – 0.09% | N/A (Concept Index) | 0.25% ($25 per $10,000/yr) |
| Market Availability | Standard ETF (SPY/VOO/IVV) | Requires manual trading / short pairing | Live ETF Ticker (EQWL on NYSE Arca) |
Key Differences to Keep in Mind:
Tech Exposure: S&P 90 cap-weights non-top-10 tech growth companies (like Salesforce, Adobe, and Oracle). EQWL holds these exact same companies but caps them at ~1.0% each, leading to a slightly higher tech weighting (~20.3%) than pure S&P 90 (~14.5%), but still far below the market-cap S&P 100 (~38%+).
Valuation Cushion: The pure S&P 90 drops to a lower Forward P/E (15.42x) because mega-cap value names like Berkshire Hathaway and Eli Lilly carry heavier cap-weights. EQWL trades at a 18.18x Forward P/E due to equal allocation across growth and value
Valuation Reset: Comparing the traditional S&P 500 against the S&P 90 shows a massive valuation discount—the S&P 90 reduces the Forward P/E from 19.09x down to 15.42x (and Trailing P/E from 26.36x down to ~17.20x).
De-concentration Impact: The S&P 500 carries a heavy ~35%+ concentration in its top 10 positions, whereas EQWL slashes top 10 concentration down to ~11.9% and the S&P 90 eliminates it entirely (0.0%).
- Sector
Defensive Shift: Both S&P 90 and EQWL cut Tech exposure
significantly (from ~32% in SPY down to ~14.5% and ~20.3%,
respectively) while nearly doubling allocation to cash-flow-rich sectors
like Financials and Health Care.
Conclusion: The Ultimate Portfolio Realignment
Moving capital into an S&P 90 framework—or its executable proxy EQWL—allows you to strip away hyper-extended valuation risks while retaining the balance-sheet strength, pricing power, and liquidity of America’s top corporations. In an economy transitioning into a structural high-rate regime, it offers deep free cash flow yields and defensive cushions without sacrificing equity upside.
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