What is the difference between VOO and VTI?
Vanguard describes VOO’s benchmark as the S&P 500. Its VTI materials describe total-market coverage spanning large, mid, small, and micro-cap stocks.
A broader holdings list tells you that additional companies are included; it does not tell you how much each affects the fund. Inspect portfolio weights as well as the number of holdings when assessing the practical difference.
Source references: Vanguard — VOO — Vanguard S&P 500 ETF · Vanguard — VTI — Total Stock Market ETF
Why do some VTI pages say Morningstar and others say CRSP?
Vanguard announced that VTI would become Vanguard Morningstar Total Stock Market ETF effective July 29, 2026, and the CRSP US Total Market Index would be renamed Morningstar US Total Market Index. The announcement says the ticker and index methodology remain unchanged.
When comparing older factsheets with newer materials, match the VTI ticker and document dates. A naming change by itself is not evidence that you now own a different investment strategy.
Source references: Vanguard — Name changes for Vanguard equity index funds and CRSP/Morningstar benchmarks
Does owning VOO and VTI increase diversification?
Because these funds cover overlapping U.S. equity markets, count the underlying company exposure rather than treating each fund as a separate risk bucket. The following worksheet is hypothetical and is not a measurement of either fund’s current holdings.
Suppose Fund A holds 8% in Company X and Fund B holds 6%; splitting a USD 10,000 portfolio equally puts USD 400 plus USD 300 into that company. The combined exposure is USD 700, or 7%, not 14% and not zero overlap.
| Holding | Portfolio allocation | Company X exposure |
|---|---|---|
| Fund A | USD 5,000 | USD 400 |
| Fund B | USD 5,000 | USD 300 |
| Combined | USD 10,000 | USD 700 (7%) |
How should you compare VOO and VTI for your portfolio?
Define the intended role first: large-company U.S. equity exposure or broader U.S. equity coverage. Then compare current holdings, the prospectus, fund expenses, trading conditions, and what you already own.
Keep return comparisons on the same start date, end date, and dividend-reinvestment basis. This guide does not quote live fees, holdings counts, or an overlap percentage; those require a dated, matching pair of fund disclosures.
Limitations to keep in view
Neither fund removes stock-market risk or guarantees that smaller-company exposure will improve returns. U.S. equity funds also do not by themselves supply bond or broad international-stock exposure.
The examples explain portfolio arithmetic, not a recommendation to buy, sell, or hold either fund. Recheck issuer documents before using product details in a decision.
Sources & corrections
Prepared with AI assistance and automated source and calculation checks. No independent human analyst review is claimed. Hypothetical examples and historical data are identified in the text.
Use the linked primary sources to check definitions and company disclosures. Filings and service details can change; verify the relevant period before relying on a figure.
- Vanguard — VOO — Vanguard S&P 500 ETF
- Vanguard — VTI — Total Stock Market ETF
- Vanguard — Name changes for Vanguard equity index funds and CRSP/Morningstar benchmarks
Found an error? Send a correction with the page, the claim and a supporting source. These guides provide general education; they do not assess your financial circumstances or recommend a trade. Read our research disclosures.