Article
How to Invest in VOO, SPY, QQQ and other US Stocks From Mexico
A practical guide to buying US ETFs and stocks in pesos, from brokers and fees to the W-8BEN and currency risk.
Federico Rösel
·6 min read
If you live in Mexico and want to own a slice of the US market, you have never had more options. Buying US ETFs like VOO (VOO), SPY (SPY), and QQQ (QQQ), or individual US stocks such as Apple (AAPL) and Nvidia (NVDA), is now possible from a Mexican brokerage account in a few taps. This guide walks through exactly how it works, what it costs, how taxes apply, and how to avoid the mistakes that quietly eat your returns.
Why Mexican Investors Look to the US Market
The US stock market is the deepest and most liquid in the world, and it is home to companies most Mexicans already use every day - Apple, Amazon, Microsoft, Netflix, Visa. For a peso-based investor, holding US assets also means holding dollars, which historically has helped offset peso weakness during periods of local inflation or currency stress.
That said, US exposure is not a magic shield. The peso has had long stretches of strength against the dollar, and a strong peso can erase part of your US gains when you convert back. The point is not that dollars always win - it is that owning global assets adds a source of return that does not move in lockstep with the Mexican economy. That is real diversification.
VOO, SPY, and QQQ: What You Are Actually Buying
Before you buy anything, understand what these three tickers represent. Two of them track the same index, and one is very different.
- VOO - Vanguard S&P 500 ETF. Holds the 500 largest US companies. Ultra-low cost, with an expense ratio around 0.03%. The default core holding for most long-term investors.
- SPY - SPDR S&P 500 ETF. Tracks the same S&P 500 index as VOO, but is the oldest and most heavily traded ETF in the world. Its expense ratio is higher (around 0.09%), so for buy-and-hold investors VOO is usually the cheaper choice.
- QQQ - Invesco QQQ. Tracks the Nasdaq-100, which is concentrated in large technology names like Apple, Microsoft, and Nvidia. More growth-focused, more volatile, and not diversified across all sectors.
VOO and SPY are close substitutes - you generally do not need both. Owning VOO plus QQQ makes more sense than VOO plus SPY, because QQQ adds a different (tech-heavy) exposure while SPY just duplicates VOO.
An ETF is simply a basket of many stocks that trades like a single share. Instead of picking winners, you buy the whole basket in one transaction - which is why ETFs are the most common starting point for beginners.
How to Buy US Stocks and ETFs From Mexico
There are two main routes for a Mexican investor, and the right one depends on the account you already have.
Route 1: The Mexican market (SIC / BIVA)
Mexico's Sistema Internacional de Cotizaciones (SIC) lists hundreds of foreign ETFs and stocks that you can buy in pesos, during Mexican market hours, through local brokers like GBM, Kuspit, or the investing apps most Mexicans already know. You get local support, peso settlement, and a familiar tax setup. VOO, SPY, and QQQ are all available through the SIC.
Route 2: A US or international broker
Brokers with direct US market access let you buy the same tickers in dollars, often with fractional shares so you can invest small amounts. You will typically complete a W-8BEN form (more on that below) and fund the account in dollars, which means paying an FX spread to convert pesos. This route gives the widest selection but adds a currency-conversion step.
For most beginners investing modest amounts, buying US ETFs through the SIC in pesos is the simplest starting point. As your portfolio grows, a dollar-denominated broker can make sense for lower ongoing costs and broader access.
What It Costs: Fees, FX, and the Expense Ratio
Three costs matter, and beginners usually only notice the first one:
- Brokerage commissions - many Mexican apps now charge zero or very low commissions on ETF trades. Check before you assume.
- Currency conversion (FX spread) - if you buy in dollars, the broker's peso-to-dollar rate includes a hidden margin. Buying in pesos on the SIC avoids an explicit conversion but the peso price still reflects the exchange rate.
- The expense ratio - the annual fee charged by the ETF itself. VOO's ~0.03% means about 3 pesos per year on every 10,000 pesos invested. QQQ and SPY cost more. Over decades, this gap compounds.
The expense ratio looks tiny, but it is charged every year for as long as you hold the fund. That is why a 0.03% fund and a 0.09% fund can end up thousands of pesos apart over a long horizon.
Taxes: What Mexican Investors Need to Know
This is where US investing gets specific, and getting it wrong is expensive. Two layers apply.
US dividend withholding. The US withholds tax on dividends paid to foreign investors. By filing a W-8BEN form (your broker provides it), Mexican residents claim the treaty rate, which reduces the standard 30% withholding to 10% under the Mexico-US tax treaty. Skipping the form means paying the full 30% - so always file it.
Mexican tax (SAT). If you invest through a Mexican broker, they typically handle reporting and withholding for you and issue the annual constancia. If you use a foreign broker, you are responsible for declaring gains and dividends yourself in your annual declaration. Rules differ for capital gains versus dividends, so confirm your situation with the SAT or an accountant.
The W-8BEN is the single most important piece of paperwork for a Mexican buying US assets. Filing it drops US dividend withholding from 30% to 10%. It is free and takes minutes - do not skip it.
Currency Risk: The Part Most Guides Ignore
When you buy a US ETF, you take on two bets at once: how the US market performs, and how the peso moves against the dollar. If the S&P 500 rises 10% in dollars but the peso strengthens 10% against the dollar, your peso return is roughly flat. The reverse is also true - a weaker peso amplifies your US gains when measured in pesos.
You cannot predict the exchange rate, and you should not try. The practical answer is time and consistency: investing a fixed amount on a regular schedule, known as dollar-cost averaging, smooths out both market swings and currency swings so no single entry point defines your result.
A Simple Way to Start
You do not need to buy all three tickers, and you almost certainly should not buy individual stocks before you own a broad fund. A common, sensible framework for a beginner in Mexico looks like this:
- Open an account that gives you access to the SIC or direct US markets, and file your W-8BEN.
- Start with one broad core holding - VOO (or SPY) for the whole S&P 500.
- Only add QQQ if you specifically want more technology exposure and can stomach bigger swings.
- Consider individual stocks like Apple or Nvidia as a small satellite, not the foundation.
- Invest a fixed peso amount every month and leave it alone.
The goal is not to time the perfect entry or pick the next Nvidia. It is to own quality assets cheaply, keep costs and taxes low, and let time do the heavy lifting. For a Mexican investor, US ETFs make that genuinely accessible - as long as you file the paperwork and respect the currency risk.
Legal Notice: Education, not advice. Past results do not guarantee future returns. Investing always involves risks.
