You Own VOO. Is It as Diversified as You Think?
As of April 14, 2026
I run my own portfolio through FactorForge. VOO is one of my largest positions and a core holding — and probably one of yours too. Most people who own it think of it as "the market": diversified, reasonably valued, low cost. That's broadly true: it holds roughly 500 companies across all 11 market sectors. The model has a more specific opinion about where the weight falls.
What the model is doing
FactorForge doesn't score VOO the fund — it scores what's inside it. Using look-through analysis, the model scores VOO's underlying holdings individually and aggregates the results into portfolio-level factor scores. VOO tracks the S&P 500, so this analysis is effectively a factor breakdown of the index itself.
The scores below reflect how FactorForge scores stocks — six independent lenses, each with its own sector-calibrated thresholds, each returning a verdict without knowing what the others found.
The six-lens verdict
| Lens | Score | Verdict | Confidence |
|---|---|---|---|
| Momentum | 0.5651 | Strong | HIGH |
| Growth | 0.4565 | Strong | HIGH |
| Quality | 0.4099 | Strong | HIGH |
| Balanced | 0.3451 | Strong | HIGH |
| GARP | 0.3402 | Strong | HIGH |
| Value | 0.1149 | Moderate | HIGH |
Five of six lenses read Strong. The lone exception is value — and that's the interesting part.
The model also returns a composition score for each lens on a 0–100 scale, measuring how well the portfolio's structure aligns with that investing style. VOO's scores: Momentum 83, Growth 81, Quality 79, Balanced 78, GARP 78, Value 72. All six fall in the "Strong alignment" range, but value sits at the bottom of the stack.
What's actually inside VOO
The sector breakdown tells most of the story.
| Sector | Weight |
|---|---|
| Technology | 32.4% |
| Financial Services | 12.5% |
| Communication Services | 10.5% |
| Consumer Cyclical | 10.0% |
| Healthcare | 9.8% |
| Industrials | 9.2% |
| Consumer Defensive | 5.4% |
| Energy | 3.5% |
| Utilities | 2.5% |
| Basic Materials | 2.2% |
| Real Estate | 2.0% |
Technology at 32.4% is not incidental. Add Communication Services (10.5%) and Consumer Cyclical (10.0%) and more than half the fund sits in sectors the model treats as growth- and momentum-oriented. VOO is genuinely diversified by company count and sector coverage — but in factor terms, the weight is concentrated in the sectors that have been driving returns for the past decade. That's not a hidden flaw; it's what has been working.
Sector data reflects holdings as of 2026-02-28.
The value lens: why it dissents
The value lens scores VOO at 0.1149 — Moderate. Two metrics drive the weakness: P/E Ratio at 27.6, just below the model's unfavorable threshold of 28, and Dividend Yield at 1.19%, below the model's favorable threshold of 2.0%. On the other side of the ledger, the Expense Ratio at 0.030% scores at the maximum, and both the 3-year average return (20.0%) and 12-month return (27.7%) score at the ceiling.
The tension is straightforward. A P/E of 27.6 is close to the line the model treats as unfavorable, and at that level it sees limited margin of safety. The fund's strong return history is not a value argument — it's a momentum argument. That's why momentum is VOO's strongest lens and value is its weakest.
Momentum and macro positioning
Momentum scores highest at 0.5651, driven by a 12-month return of 27.7% and a 3-year average of 20.0% per year. The model is reading what everyone already knows: this market has been running.
The model also runs a separate regime sensitivity analysis — not a lens score, but a map of how VOO's sector weights have historically behaved across macro environments:
| Regime | Signal |
|---|---|
| High Growth / Risk-On | Strong Tailwind (+0.52) |
| Tech / Innovation Bull | Strong Tailwind (+0.27) |
| Value Rotation | Neutral (−0.06) |
| Rising Rates | Strong Headwind (−0.29) |
| Inflation / Stagflation | Strong Headwind (−0.44) |
| Risk-Off / Recession | Strong Headwind (−0.59) |
Regime scores are model-computed from sector weights and historical sensitivity patterns. Values shown rounded to two decimal places.
VOO is structurally suited for the environment it has thrived in. It faces meaningful headwinds in three of six historical regime patterns. That's not a criticism — it's a description of what 32.4% technology concentration implies.
Notable holdings
The look-through shows NVDA as the single largest position at 7.85% — more than AAPL (6.55%) and MSFT (4.72%) individually. Alphabet appears twice due to its dual-class share structure: GOOGL at 3.16% and GOOG at 2.53%, for a combined 5.69% — third-largest exposure in the fund behind only NVDA and AAPL.
Berkshire Hathaway (BRKB) at 1.51% sits near the bottom of the top holdings. It's a classic value-oriented business inside what the model scores as a growth and momentum portfolio. Its presence is a reminder that the model's aggregate scores reflect the weight of the whole — any individual name can cut against the grain.
What the model doesn't capture
Several things are outside the model's scope:
- Rebalancing — the S&P 500 reconstitutes quarterly, and the model's ETF holdings data refreshes weekly. Holdings shown here reflect the most recent available cache as of April 14, 2026.
- Passive structure advantages — VOO's 0.030% expense ratio and its tax efficiency as a passive vehicle are real advantages. The expense ratio appears in the model as a metric, but the structural benefits of passive investing don't map to any factor score.
- Forward earnings — the P/E of 27.6 is trailing. If earnings grow into the multiple, the value lens score would improve. The model scores what has happened, not what analysts expect to happen.
- Non-equity factors — VOO is 100% equity. Interest rate sensitivity and macro correlation are captured only indirectly through the regime sensitivity framework.
Summary
At $638.35 on April 14, 2026, VOO's look-through holdings score Strong on five of six lenses — momentum most strongly at 0.5651, value most weakly at 0.1149. The fund is 32.4% technology, carries a trailing P/E of 27.6, and yields 1.19%. VOO holds roughly 500 companies across all 11 sectors — that breadth is real. What the model adds is a factor lens: this portfolio reads most like a growth portfolio, and least like a value portfolio.
FactorForge scores stocks across six independent investing frameworks: value, growth, quality, GARP (growth at a reasonable price), momentum, and a balanced composite. Each lens applies its own sector-calibrated thresholds and doesn't know what the others are doing. Verdicts reflect each lens's aggregate score, not a single metric.
For a full walkthrough of the methodology, see How FactorForge Scores Your Portfolio.
All scores and metrics are generated by the FactorForge scoring engine as of April 14, 2026, based on look-through holdings data available at that time. ETF holdings are point-in-time snapshots; actual fund composition changes as positions are added, removed, or rebalanced. This is not financial advice about Vanguard S&P 500 ETF (VOO), its management, or its suitability for any investor. FactorForge scores the underlying holdings individually using sector-calibrated thresholds; it does not evaluate fund structure, expense ratios, tracking error, or management quality. You are solely responsible for any investment decisions you make. Always consult a qualified financial advisor. Do not rely solely on FactorForge for financial decisions.