Is it worth investing in index funds in 2026?

CA carmen1961 MX 🌱 Newbie 👁 50 ⚑ Report Investing

I've been wanting to put money into the stock market for like 6 months now but I'm scared of losing everything. I have some savings in pesos that are losing value to inflation and I'm looking at index funds that track the S&P 500. Is anyone else putting money into that? How safe is it?

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★ Best answer

S&P 500 index funds aren't risk-free investments, but historically they've bounced back from downturns over the long haul (we're talking years, not months). Your concern makes sense if you need the money in the short term, but if it's money you can leave alone for several years, the diversification benefits and low fees these funds offer usually make up for it way more than sitting on pesos that lose value to inflation. A lot of people invest this way precisely because it's safer than putting all your eggs in individual stocks, though that doesn't mean there's no volatility. Maybe start by putting in a small amount - whatever lets you sleep soundly - and increase it as you get more comfortable with it.

The inflation you're mentioning is the real risk you're running by keeping your money in pesos, so you're already losing even if you don't see it day by day. What changes with index funds is that the risk is more visible - you see fluctuations on the screen - but in exchange you get exposure to companies that generate real value, not just currency erosion.

Where a lot of people mess up is thinking that six months is enough time to put it all in at once. If you're really scared of losing, put it in tranches over the next few months or years; that way you dilute the risk of jumping in right before a crash. And another thing: check carefully what fund you're buying, because management costs (annual fees) can eat up a decent chunk of your gains if they're too high.

I got into this a while back with the same kind of fear you've got, and honestly, the biggest risk isn't investing - it's not investing, because your money in pesos is silently evaporating. S&P 500 index funds will have their downturns (that's for sure), but if your horizon is several years or more, historically they bounce back and leave you ahead. What you do need to be clear on is that this isn't something to pull out after 6 months if the market drops; it's for the long haul. Plus, starting little by little (instead of throwing everything in at once) helps you sleep at night and keeps you from panicking if there's a correction.

The part nobody mentions is what happens if you need to pull the money out urgently in the middle of a market crash - that's when you really lose, because you're selling at the worst possible moment. Before you put money into index funds, make sure you have an emergency cushion in cash (like three to six months of expenses) because the S&P 500 is for money you won't need over the next few years. If you've already got that covered and your pesos are getting eaten up by inflation, index funds are way more sensible than letting it sit there rotting away, but only if your time horizon is several years minimum.

What matters is your time horizon: if you need that money in the next 2-3 years, index funds aren't for you, but if you can leave it alone for 5+ years, inflation in pesos is going to hurt you more than any temporary market dip. The critical thing is to have an emergency fund set aside in something liquid before you put money into the S&P 500, so you're not forced to sell at the worst possible time.

Don't put in money you'll need in the next few years - that's the thing that matters! I've had a chunk sitting in dollars for a while and another part in a fund that tracks broad indices, and honestly the difference is brutal compared to just leaving everything in pesos. The market does fall, that's true, but if your timeline is long (we're talking 5+ years minimum), historically you bounce back and you also beat the inflation that's eating you alive right now in a savings account. What I'd say though, start with what you genuinely have left over, not with money you might need urgently.

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