VOO and VTI are nearly identical low-cost choices at a 0.03% expense ratio; SPY does the same S&P 500 job at 0.0945% (roughly triple the fee). Pick VOO for the pure S&P 500, VTI for the total US market (S&P 500 plus mid- and small-caps), and SPY only if you need its deep options liquidity for active trading. For a long-term buy-and-hold investor, VOO or VTI beats SPY on cost every year.
“VOO vs VTI vs SPY” is the most-searched ETF comparison there is, and the confusion is understandable: the three tickers get thrown around as if they are interchangeable. They are not. Two of them — VOO and SPY — track the exact same index at very different prices. The third — VTI — tracks a broader index entirely. This article settles it with the numbers that actually matter, sourced from Vanguard’s and State Street’s own fund pages.
The Headline Numbers (2026)
| Metric | VOO | VTI | SPY |
|---|---|---|---|
| Issuer | Vanguard | Vanguard | State Street |
| Expense ratio | 0.03% | 0.03% | 0.0945% |
| Index tracked | S&P 500 | CRSP US Total Market | S&P 500 |
| Holdings (approx.) | ~500 | ~3,500+ | ~500 |
| Market coverage | Large-cap (~83%) | Total US market (~100%) | Large-cap (~83%) |
| Fee on $100k / yr | $30 | $30 | ~$95 |
| 30-day SEC yield (illustrative) | ~1.3% | ~1.3% | ~1.3% |
| Fund structure | Open-ended ETF | Open-ended ETF | Unit investment trust |
| Options liquidity | Good | Moderate | Best-in-class |
| Inception | Sep 2010 | May 2001 | Jan 1993 |
Expense ratios verified on each issuer’s fund page (source: investor.vanguard.com/VOO, investor.vanguard.com/VTI, and ssga.com/SPY). Yields and AUM drift daily; expense ratios and index methodology are stable and are the durable differences here.
What Each One Actually Tracks
VOO (Vanguard S&P 500 ETF) tracks the S&P 500 Index — the roughly 500 largest US companies as selected by S&P Dow Jones Indices’ committee. That basket represents about 80-85% of total US equity market value. It is the classic “the market” proxy that most people mean when they say they own the S&P 500.
SPY (SPDR S&P 500 ETF Trust) tracks the same S&P 500 index as VOO. Holdings-wise, they are twins. SPY is simply the original 1993 wrapper — the first US-listed ETF ever — and it carries a higher fee and an older legal structure (more on both below).
VTI (Vanguard Total Stock Market ETF) tracks the CRSP US Total Market Index — a far broader basket of around 3,500+ stocks spanning large-, mid-, and small-cap US companies. VTI is not an S&P 500 fund; it owns the whole US market, including the smaller companies VOO and SPY leave out. Because it is market-cap weighted, the same megacaps that dominate the S&P 500 also dominate VTI, which is why VTI behaves so much like VOO despite holding seven times as many stocks.
Holdings Overlap: VOO and VTI Are ~83% the Same
This is the number that surprises people. Even though VTI holds thousands more stocks than VOO, the two overlap roughly 82-84% by weight, because both are market-cap weighted and the largest US companies sit at the top of each. The same handful of megacap names make up a huge share of both funds. VTI’s extra ~17% is spread thinly across hundreds of mid- and small-cap holdings that individually barely move the needle.
VOO and SPY, tracking the identical index, overlap essentially 100% by holdings — the only differences between them are fee, structure, and tiny tracking variations. So the real decision tree is simple: VOO vs SPY is a cost-and-structure question about the same portfolio, while VOO vs VTI is a genuine question about how much of the market you want to own. Our VOO vs VTI comparison tool shows the live holdings and weightings side by side.
SPY’s Higher Fee: Where It Comes From
SPY charges 0.0945% versus VOO’s 0.03% for the same index. The reason is partly historical and partly structural. SPY launched in 1993 as a unit investment trust (UIT), an older ETF wrapper that, by its rules, cannot immediately reinvest incoming dividends and cannot lend out its securities to earn offsetting income. Dividends sit as cash until they are paid out — a small performance drag known as “cash drag.” VOO, as a modern open-ended fund, reinvests dividends internally and can lend securities to trim costs.
State Street has kept SPY’s fee elevated because its unrivaled liquidity and options ecosystem give it franchise value with professional traders who do not care about a few basis points. (State Street even offers a cheaper clone, SPLG, at a VOO-like fee for cost-sensitive investors.) For a buy-and-hold investor, though, that extra ~0.06% per year is pure drag. On $100,000 it is roughly $65 more per year, every year, compounding against you. Our ETF fee-drag analysis shows exactly what each 0.1% costs over 30 years.
Liquidity and Options: SPY’s One Real Edge
SPY has the deepest, most liquid options market of any ETF on earth — penny-wide strikes, massive open interest, and razor-thin bid-ask spreads across every expiration. If you write covered calls, trade spreads, or use the fund as a hedging instrument, SPY’s liquidity genuinely justifies its higher expense ratio. VOO has options too, but they are far thinner and wider. VTI’s options are thinner still.
For the ordinary buy-and-hold investor who never touches an option, this advantage is irrelevant. Both VOO and VTI are enormously liquid for share trading, with tight spreads and billions in daily volume. You will never notice a liquidity difference buying or selling shares of any of the three.
Dividends: All Three Are Modest
None of these is an income fund. All three yield roughly ~1.2-1.5% (30-day SEC yield, illustrative and market-dependent), because the S&P 500 and total US market are growth-and-value blends dominated by lower-yielding megacaps. VOO and VTI reinvest dividends efficiently within the fund; SPY’s UIT structure holds them as cash until distribution — the cash-drag point again. If your goal is monthly or quarterly income rather than total return, none of these three is the tool; a dedicated dividend ETF like SCHD or VYM yields two to three times as much. See our SCHD vs VYM dividend comparison and our guide to how much you need to earn $1,000 a month in dividends.
When Each One Wins
Pick VOO if: you want a pure, low-cost S&P 500 core. It is the default answer for most long-term investors — 0.03% fee, the classic index, and the modern efficient structure.
Pick VTI if: you want to own the entire US market in one ticker — large, mid, and small caps — at the same 0.03% fee. It is the maximalist “set it and forget it” total-market choice, with a slight small-cap tilt VOO lacks.
Pick SPY only if: you actively trade options or need the deepest liquidity for institutional-scale or short-term positions. For everyone else, SPY’s higher fee makes it the weakest buy-and-hold option of the three.
The choice between VOO and VTI is close enough that it barely matters over decades — both are excellent. The choice to avoid SPY for long-term holding, by contrast, is clear on cost alone. For a deeper dive on the same-index trio, see our VOO vs SPY vs IVV breakdown, and for the total-market-vs-500 debate, our VTI vs VOO deep dive.
Compare Them Side by Side
FundDuel’s comparison tools pull live expense ratios, yields, holdings, and sector weights for any pair head-to-head:
- VOO vs VTI comparison — S&P 500 vs total US market.
- SPY vs VOO comparison — the same index, two fees.
- VOO vs IVV comparison — the other 0.03% S&P 500 fund, from BlackRock.
Caveats
Yield, AUM, and market-coverage figures are illustrative current-range values as of mid-2026 and drift with market moves; expense ratios (0.03% VOO, 0.03% VTI, 0.0945% SPY) and the underlying index methodologies are stable. Before committing capital, verify the current expense ratio and 30-day SEC yield directly on the issuer fund pages — Vanguard for VOO and VTI, State Street for SPY — linked above. Those are the authoritative sources. Nothing here is investment advice.