ETFs
VOO vs VTI: AI-Powered Investment Comparison
A structural side-by-side look at Vanguard S&P 500 ETF (VOO) and Vanguard Total Stock Market ETF (VTI): how each business actually makes money, what could go wrong and which investor profile each name suits best. ARIA Analyst scores both tickers with the same deterministic engine so the comparison stays apples-to-apples.
Side-by-side comparison
| Metric | VOO | VTI |
|---|---|---|
| Market cap | One of the largest ETFs globally | One of the largest ETFs globally |
| Sector | ETF | ETF |
| Industry | Large-cap US Equity Index | Total US Equity Market |
| P/E ratio (approx.) | Tracks S&P 500 | Tracks total US market |
| 1Y range (qualitative) | Tracks broad US equity market | Tracks broad US equity market |
| ARIA verdict | View live score | View live score |
| Confidence | See ML calibration | See ML calibration |
All figures are qualitative or historical ranges. For dated, live metrics including current price, valuation multiples and ARIA score, open the per-ticker analysis page.
Business overview
Vanguard S&P 500 ETF (VOO) (VOO)
VOO is Vanguard's S&P 500 ETF, structured as an open-end fund with one of the lowest expense ratios in the category. It is the default long-term-hold S&P 500 vehicle for most buy-and-hold investors.
Liquidity is high though somewhat less than SPY for active trading.
Vanguard Total Stock Market ETF (VTI) (VTI)
VTI tracks the CRSP US Total Market Index, providing exposure to essentially the entire US equity market across large, mid, small and micro-cap stocks. The expense ratio is among the lowest available.
VTI is broader than VOO by including small and mid-cap exposure, though the portfolio remains dominated by mega-caps by weight.
Why ARIA Analyst flags each as worth a closer look
VOO: structural strengths
Among the lowest expense ratios for S&P 500 exposure, Vanguard's investor-friendly structure and excellent tracking error.
ARIA's deterministic scorer evaluates VOO across 13 dimensions covering fundamentals, technicals, momentum, volatility, macro and sentiment. Sign up for the live score.
VTI: structural strengths
Broadest single-fund US equity exposure available, very low expense ratio and excellent tracking.
ARIA's deterministic scorer evaluates VTI across 13 dimensions covering fundamentals, technicals, momentum, volatility, macro and sentiment. Sign up for the live score.
Risk factors to consider
Risks for VOO
- -Concentration risk in mega-cap technology.
- -Lower options-market depth than SPY.
- -Tracks broad equity drawdowns.
- -No active management to mitigate concentration.
Risks for VTI
- -Despite breadth, mega-caps still dominate by weight.
- -No international diversification.
- -Tracks broad equity drawdowns.
- -Small-cap weighting may underperform in mega-cap-led markets.
Which is right for you?
The honest answer is "it depends on what kind of investor you are". Both VOO and VTI have credible long-term theses, but they reward different temperaments and different portfolio roles.
If you are a growth investor prioritizing earnings acceleration, the question is which company has the larger ceiling and the cleaner near-term catalysts. Long-term buy-and-hold investors who prioritize low costs and tracking efficiency. Buy-and-hold investors who want the broadest possible US equity exposure in a single ticker.
If you are a value investor focused on the multiple paid versus the cash returned, look at the P/E and free-cash-flow context in the table above plus the capital-return policy of each name. Where one has a more aggressive buyback or a higher dividend yield, that matters more than headline growth.
If you are a dividend investor concerned with stable income, the qualitative payout discipline of each business is the key signal. Some names on this page pay meaningful dividends with long growth records; others do not pay any dividend at all. Read the risk section carefully to gauge dividend safety, not just yield.
For most readers, the real answer is not "pick one" but "own both, sized to conviction". ARIA's portfolio module can quantify how much of each to hold given your existing portfolio and risk budget.
Get full ARIA analysis on VOO and VTI
See the 5-agent deterministic score (macro, fundamental, technical, sentiment, risk), the ML ensemble probability across four horizons and the Bull vs Bear AI debate for each ticker. Free tier includes three analyses per day, no credit card required.
Per-ticker analysis pages
Frequently asked questions
Is VOO or VTI a better investment right now?+
There is no single right answer. Vanguard S&P 500 ETF (VOO) is generally long-term buy-and-hold investors who prioritize low costs and tracking efficiency. Vanguard Total Stock Market ETF (VTI) is generally buy-and-hold investors who want the broadest possible us equity exposure in a single ticker. ARIA Analyst evaluates both with a 5-agent deterministic scoring core (macro, fundamental, technical, sentiment, risk) augmented by AI layers (ML ensemble + Bull vs Bear debate + 10 Deep Search agents); sign up for the live, dated score on each ticker.
What are the main differences between VOO and VTI?+
Vanguard S&P 500 ETF operates in the Large-cap US Equity Index industry within ETF; Vanguard Total Stock Market ETF operates in the Total US Equity Market industry within ETF. Vanguard S&P 500 ETF is positioned for long-term buy-and-hold investors who prioritize low costs and tracking efficiency. Vanguard Total Stock Market ETF is positioned for buy-and-hold investors who want the broadest possible us equity exposure in a single ticker.
Which has more growth potential, VOO or VTI?+
Growth potential depends on horizon and risk tolerance. Vanguard S&P 500 ETF's key strength is that among the lowest expense ratios for S&P 500 exposure, Vanguard's investor-friendly structure and excellent tracking error. Vanguard Total Stock Market ETF's key strength is that broadest single-fund US equity exposure available, very low expense ratio and excellent tracking. ARIA's ML ensemble produces a calibrated probability for each horizon (1M, 3M, 6M, 12M).
What are the biggest risks for VOO and VTI?+
For Vanguard S&P 500 ETF (VOO), the most-discussed risks include: Concentration risk in mega-cap technology.; Lower options-market depth than SPY.; Tracks broad equity drawdowns.. For Vanguard Total Stock Market ETF (VTI), the most-discussed risks include: Despite breadth, mega-caps still dominate by weight.; No international diversification.; Tracks broad equity drawdowns..
Does ARIA Analyst recommend VOO or VTI?+
ARIA does not give blanket buy or sell recommendations. Each ticker receives a deterministic multi-agent score, a calibrated ML probability and a Bull vs Bear synthesis. The live scores for VOO and VTI are available to registered users, and they update as the underlying data changes.