If you have already read about the best ETFs to start investing, two names keep coming up: VOO and VTI. Both are from Vanguard, both cost the same, and both can be bought in pesos from Mexico. So which one makes more sense when you are just starting out? The honest answer up front: neither is universally "better" - they simply cover different slices of the US market, and for a beginner the practical difference is smaller than the internet makes it sound.
VOO and VTI in one sentence each
VOO is the Vanguard S&P 500 ETF: it holds roughly 500 of the largest companies in the United States, the classic large-cap benchmark. VTI is the Vanguard Total Stock Market ETF: it holds the entire US stock market - around 3,531 companies spanning large, mid and small caps. In plain terms, VOO buys the giants; VTI buys the giants plus almost everything else listed in the US.
The headline difference is scope. VOO tracks the S&P 500, so it is roughly 100% large-cap. VTI tracks the whole US market, which works out to about 82% large-cap, roughly 12% mid-cap and around 6% small-cap. On paper that sounds like a big gap in diversification. In practice it is much narrower than it looks.
Here is why. VTI is market-cap weighted, meaning the biggest companies take up the most space. Because the US giants are so dominant, VOO's ~500 companies already make up about 82% of VTI's total weight. The two funds share the same top-10 holdings, in the same order, and only the exact weightings differ. VTI's "extra" - thousands of mid- and small-cap names - collectively accounts for only around 18% of the fund. Put another way: VOO is essentially a subset of VTI. Every company in VOO is also inside VTI.
That ~82% overlap figure is an approximate third-party estimate, not an official Vanguard number, so treat it as "over 80%" rather than a precise measurement. The part that is fully defensible is the qualitative claim: VOO is a subset of VTI, and they share their ten largest holdings.
Shared top-10 holdings (same names, same order in both funds - only the weight differs, as of the 30-Jun-2026 Vanguard fact sheets): NVIDIA, Apple, Alphabet, Microsoft, Amazon, Broadcom, Micron, Meta, Tesla and Eli Lilly.
VOO vs VTI side by side
The table below sums up the practical differences. Notice how few of them actually matter for a first portfolio.
Index tracked: VOO follows the S&P 500; VTI follows the CRSP US Total Market Index (being renamed to a Morningstar index around July 2026 - more on that below).
What it covers: VOO holds ~500 large US companies; VTI holds the entire US market (large + mid + small cap).
Number of holdings: 506 (VOO) vs 3,531 (VTI).
Annual cost (expense ratio): 0.03% for both - neither is cheaper.
Dividend yield (trailing 12 months): about 1.07-1.08% for both as of June 2026 (third-party estimate - verify the current figure before you invest).
Dividend frequency: quarterly for both.
Cap composition: VOO ~100% large-cap; VTI ~82% large / ~12% mid / ~6% small (approximate).
Available in Mexico: yes - both trade on the BMV's SIC and can be bought in pesos.
The single most important row is the cost. Both funds charge a 0.03% expense ratio, which means about 30 US cents a year for every 1,000 dollars invested. Cost is often the deciding factor between funds - here it is a tie.
Historically, no - the two have delivered nearly identical results, which makes sense given they share about 82% of their weight and the same top-10. The figures below are past returns as of 30 June 2026, and they are history, not a forecast. No one can promise what either fund will do next.
The gaps are small and they do not consistently point the same way: VTI edged ahead over one year, VOO over five and ten. Over a full market cycle they tend to move together. Whichever you pick, do not expect one to quietly outrun the other - historically they have not.
This is a matter of what exposure you want, not of one fund being smarter than the other. VOO makes sense if you specifically want pure S&P 500 exposure - the most-cited US benchmark, large caps only. VTI makes sense if you want the broadest possible US diversification in a single ticker, including the mid- and small-cap companies that VOO leaves out.
Being honest about it: for a beginner the practical difference is small. Same 0.03% cost, both extremely diversified, both are core Vanguard building blocks that millions of investors hold. Neither is "the best," and the success of a starter portfolio does not hinge on this choice. Picking either one and contributing to it consistently matters far more than which of the two you pick.
How to buy VOO or VTI from Mexico
Both ETFs are listed on the SIC (Sistema Internacional de Cotizaciones) of the Bolsa Mexicana de Valores, so you can buy them in pesos (MXN) through a Mexican casa de bolsa - GBM and Kuspit both offer SIC access, among others - without needing a US account. Alternatively you can use a foreign broker, in which case you are responsible for reporting the account and its returns to the SAT. We name these brokers as examples, not as recommendations; compare their fees and minimums yourself.
Exchange-rate risk applies to both, equally. VOO and VTI are denominated in US dollars, so your result in pesos also depends on the MXN/USD exchange rate. If the peso strengthens against the dollar, it can eat into your returns even if the fund rises - and vice versa. This is currency risk, and it is not a reason to choose one over the other, because it hits both the same way.
What about taxes?
Taxes work the same way for both funds. US dividends are subject to a 30% withholding that drops to 10% if you file a W-8BEN form with your broker, and capital gains realized through the SIC are generally taxed at an ISR rate of around 10%. The exact impact depends on your personal situation, so consult an accountant. For the details on the W-8BEN and how US dividends are taxed for Mexican investors, see our dedicated tax guide.
Footnote on the VTI index: Around July 2026 the benchmark VTI tracks is being renamed from the CRSP US Total Market Index to a Morningstar index. The ticker (VTI) and the fund's strategy do not change - it still tracks the entire US market. Verify the current index name at the time you read this.
Frequently asked questions
Which is cheaper, VOO or VTI?
They cost the same: a 0.03% expense ratio for both, according to Vanguard's fact sheets as of 30 June 2026. Cost is not a tiebreaker here.
How many companies does each hold?
VOO holds around 506 companies (the S&P 500 large caps). VTI holds around 3,531, covering the entire US market including mid and small caps.
Do they perform very differently?
Historically they have been nearly identical, because they share about 82% of their weight and the same top-10 holdings. Past performance is not a guarantee of future results.
Can I buy them in pesos from Mexico?
Yes. Both trade on the BMV's SIC (as BMV:VOO and BMV:VTI) and can be bought in pesos through a Mexican casa de bolsa, or through a foreign broker if you prefer.
Is there exchange-rate risk?
Yes. Both are denominated in US dollars, so the MXN/USD exchange rate affects your result in pesos. This risk applies equally to VOO and VTI.
So which one should I buy?
There is no universal answer. VOO gives you only large caps and the classic S&P 500; VTI gives you the whole US market. Both are low-cost and highly diversified. This is education, not a recommendation - consider your goals and, if in doubt, consult a professional.
Legal Notice: Education, not advice. Past results do not guarantee future returns. Investing always involves risks.
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