VOO Is 21% Nvidia, Apple and Microsoft. Is It Secretly an AI Bet?

Is VOO secretly an AI bet? 21% in 3 stocks

0:00 Nvidia, Apple, and Microsoft make up about 21 and 1/2% of VOO, the fund a lot of people buy so they don't have to pick stocks. So, when Alphabet fell about 12% on Thursday, October 29th, and lost roughly 500 billion in market value in a single day, every VOO owner felt it, whether they meant to bet on Google or not. So, is your boring index fund secretly an AI bet? But, if that sounds scary, stick around because that same concentration is the reason VOO has beaten the fair version of the S&P 500 for a decade.

0:25 Think of VOO like a variety pack of chips.

How the S&P 500 sizes each company

0:27 The bag says over 500 flavors, but when you open it, more than one chip in every five is Nvidia, Apple, or Microsoft. Still a great bag, just not the bag people think that they bought. And that's on purpose. VOO tracks the S&P 500, which sizes each company by its total stock market value. So, the bigger a company gets, the more of your money goes into it automatically. That's why Nvidia alone is about 8.4% of the fund, and the top 10 companies add up to nearly 40%.

0:51 The other 500 or so companies split what's left. So, what's in the rest? Companies like Berkshire Hathaway, Eli Lilly, JP Morgan, and Exxon. Huge, famous businesses, and each one is only about 1 to 1.4% of the fund. Exxon, the oil giant, is a smaller slice than Micron, a memory chip maker. Nobody at Vanguard decided to go all in on AI. When Nvidia's stock went up, its slice of the index grew on its own, and every new dollar you added bought a little more of it.

1:17 It's a snowball rolling downhill, and your monthly deposit keeps giving it a push. Your index fund has a few big drivers now, and they all love AI. Here's how I grouped it: Nvidia, Microsoft, Amazon, both share classes of Alphabet, Broadcom, Meta, Micron, and AMD all have a story right now that runs on AI chips, AI cloud, or AI spending.

The AI group: about 32% of VOO

1:36 Add up their weights in Vanguard's latest holdings report, and that group is about 32% of VOO. I left Apple out, even though it's the second biggest holding, because its story is still mostly the iPhone. Count Apple, too, and you're close to 40%. So, yes, a big chunk of your diversified fund runs on one idea. Boomer says just buy the index and stop worrying. Zoomer has his whole account in Nvidia options. The funny part is they own a lot more of the same companies than either of them would admit.

2:00 Thursday showed what that feels like.

Thursday's AI split: Alphabet, Microsoft, Amazon

2:02 Alphabet dropped on worries about AI spending and softer search ads, even though it's cloud business more than doubled. Microsoft went up after its Azure cloud business grew 48% and after the close Amazon missed on earnings even with its AWS cloud business growing nearly 40%. Same index, same day, and the AI story pulled your index fund in two directions at once. So, is this a bubble? Here's a number that should get your attention.

Bigger than the dot-com bubble?

2:24 At the peak of the dot-com bubble in 2000, the top 10 stocks were just over 26% of the S&P 500, according to research from Morgan Stanley. Today, the top 10 are nearly 40% and in June tech share of the whole index hit a record, higher than at the dot-com peak, based on LSEG data reported by Reuters. Bigger than the dot-com bubble is not a sentence that anybody wants to hear. But, here's a critical difference. Back in 2000, a lot of the hottest stocks had high prices and thin profits.

2:50 Today, tech companies earn more than a quarter of all the profits in the S&P 500, almost double their share back then, according to the Bespoke Investment Group. These companies are expensive, but they are actually making a lot of money.

The bull case and the bear case for AI spending

3:01 Positive Pete's case is simple. The AI money is showing up. Microsoft's Azure grew 48% Google's cloud more than doubled and Amazon expects AWS to grow faster than 40% in both 2027 and 2028. Negative Nelly's case is just as simple. The spending is showing up faster. Alphabet's free cash flow swung to a loss of about 9 billion this quarter as its AI spending climbed. Free cash flow is the money left after the company pays for everything, including all those data centers.

3:24 For Alphabet, it went negative. Both of them can be right at the same time.

The Nifty Fifty lesson

3:31 But, this has happened before. In the early 1970s, investors piled into the Nifty 50, famous growth stocks people called one decision stocks because you just buy them and never sell. Then, the 1973 to 1974 bear market hit and many of them fell hard. Lesson wasn't that great companies are bad. It's that great companies can still get to expensive.

VOO vs equal weight (RSP): why concentration paid off

3:49 But, the concentration has paid you. There's a version of the S&P 500 that gives every company the same slice, about 0.2% each. It's called equal weight and the biggest fund for it is RSP. So, over 10 years, which version actually won? As of June 2026, the regular S&P 500 fund SPY was up about 251% over 10 years. The equal weight fund was up about 207%. Only more of the winners is exactly why the normal version came out ahead. The concentration that everyone worries about is the same thing that made VOO great.

4:17 But that cuts both ways.

The risk: one AI story, one bad week

4:20 If AI spending disappoints, Nvidia, Microsoft, Amazon, Alphabet, and Broadcom can all fall in the same week, and VOO has no small company big enough to catch them. Thursday was a small preview. Alphabet is about 5.5% of VOO. It dropped about 12% and that alone knocked roughly 0.7% off the whole fund. Wोजack checked his app and said, "But I'm diversified." [snorts] It gets even worse if you stack funds.

Owning VOO plus QQQ: the same stocks twice

4:45 If you own VOO plus QQQ plus a little Nvidia on the side, you might be making the same AI bet over and over and calling it diversification. Let's do the math on a simple example. Say you have 10 grand, half in VOO, half in QQQ, the Nasdaq 100 fund. In QQQ, Nvidia is about 8.1%, Apple about 8.1%, and Microsoft about 6.2%. That's about 22% of the fund and its top 10 holdings are about 47%. So, across your 10 grand, roughly 2.2K sits in just Nvidia, Apple, and Microsoft.

5:12 You think you own two funds. A lot of your money is in the same 10 stocks, bought twice. So, here's how to check your own exposure in about 5 minutes.

How to check your AI exposure in 5 minutes

5:20 First, add up what you really own. Look at the top 10 holdings of every fund in your account. If Nvidia shows up in your S&P 500 fund, your Nasdaq fund, and your growth fund, add those slices together. Every fund lists its holdings publicly for free. Vanguard posts VOO's on its website, and most brokers show a fund top 10 right on the quote page. Next, ask if that number fits your life. If you're 25 and adding money every month, a big AI tilt might be fine.

5:43 If you're 5 years from retirement, a sharp drop in a few stocks hurts a lot more. Most people never do this, and it takes less time than a pizza delivery.

3 moves you can make

5:59 Last, pick a move on purpose. Option one is keep VOO and do nothing, which is a perfectly good choice for a lot of people. Option two is to put part of your money in an equal weight fund like RSP. It costs more than VOO, about 0.2% a year, and it spreads your money evenly across the whole index. Option two also has a catch. If AI keeps winning, equal weight will probably trail plain old VOO, just like it did over the last decade. Another option is to add money outside big US tech, like international stocks or value fund, so not every dollar rides on one story.

6:29 None of these is a promise. Each one trades some upside for some peace of mind. But here's the upside nobody talks about.

The upside nobody talks about

6:36 If AI really is the next big thing, which I personally believe it is, VOO owners already own the biggest players without having to guess which one wins. Chad didn't pick the winner, he bought the whole bag and let the winners grow. So is VOO secretly an AI bet? Partly, yes. It's still one of the best variety packs on the shelf. Just know that more than one chip in five is the same few flavors. Tell me in the comments, did you know that your index fund was this top heavy?

6:58 YouTube picked this next one just for you. And unlike Zoomer's Nvidia options, it's actually diversified.