The 3 Best Stocks to Buy in October

With October here, it's time to start thinking about which stocks will be great investments in 2027. I've narrowed it down to a handful of stocks, and Nvidia (NASDAQ: NVDA), Amazon (NASDAQ: AMZN), and Nebius (NASDAQ: NBIS) headline them.

These three represent different segments of the market, and each should provide great returns through the end of this year and into next.

Nvidia

Nvidia has been the top AI investment for a long time, and I don't think that's any different heading into 2027. Nvidia's management told investors it expects 70% revenue growth for next year, which is downright impressive considering its size. Furthermore, Nvidia has a very strong track record of outperforming expectations, so the actual growth rate could be far higher.

Nvidia is also entering the end of the year at a fairly low valuation compared to where it normally is. In 2024 and 2025, Nvidia ended the year valued at at least 40 times forward earnings. This year, it's at 24.

NVDA PE Ratio (Forward) data by YCharts

While I don't know if Nvidia will rally to those levels before the year is over, I won't be surprised to see it go higher. That makes it a great candidate to buy now, as none of next year's impressive growth is already priced in.

Amazon

Amazon also looks like a strong stock pick, but it may not be for the reason you think. Amazon may be known for its commerce business, but I think investors should focus on its cloud computing service, Amazon Web Services (AWS). While AWS may not be the focal point for some investors, the reality is that it accounted for 60% of operating income in Q2. It's also growing at a rapid 37% pace, and with the hundreds of billions Amazon is spending on data centers, this growth rate should stay elevated throughout the next few years.

This will lead to outsize profit growth, driving Amazon stock to new heights along the way. With Amazon spending $220 billion on data center capital expenditures this year, investors will start to see some payoff next year with the massive growth it will produce. That makes it a no-brainer stock to buy now, and it could be one of the top-performing stocks next year.

Nebius

Last is Nebius. Nebius is in a similar industry as AWS, as it provides cloud computing services. However, Nebius is completely focused on AI computing, which classifies it as a neocloud computing company. Demand for purpose-built AI computing is massive, and Nebius is acquiring data centers and renting others out as fast as possible.

This is leading to one of the fastest growth rates in the market; it grew at a 454% pace during Q2. That wasn't a flash in the pan either. Wall Street analysts expect monster growth over the next few years, with 520% and 537% growth in Q3 and Q4, and then 270% growth in 2027.

That level of growth is hard to ignore for investors, and it's hard to imagine how much a company growing that quickly can expand. If Nebius can keep that growth rate up into 2028 or 2029, it will be a monstrous business; an investor will want to own a slice of this rapid grower.

These three stocks are great investments for the rest of 2026, because they each have a major catalyst coming with the AI build-out. But I also think they will be strong performers in 2027. That makes them top stocks to buy in October, as you never know when one of these may catch fire.

Keithen Drury has positions in Amazon, Nebius Group, and Nvidia. The Motley Fool has positions in and recommends Amazon and Nvidia. The Motley Fool has a disclosure policy.