Applied Materials Stock Is Defying the Downturn, But What Are You Actually Buying?

The semiconductor giant is riding a powerful AI wave, but its long-term behavior suggests it amplifies your existing market exposure more than it diversifies it.

On its latest earnings call, Applied Materials (AMAT) announced it had delivered “record revenue and earnings, along with our highest gross margin in more than 25 years.” That news, fueled by a strong AI-driven demand surge, is why the stock just jumped 7.4% in a week while the S&P 500 slid 2.6%.

When a stock stands out so starkly against a weak market, the instinct is powerful: chase the winner. It feels like a safe harbor, a sign of independent strength.

But before you pile in, your portfolio asks a different question. It’s not about where this stock will be next week, but about what owning it does to your overall risk. How much of its return is a genuinely different story, and how much is just a louder version of the market you already hold in an index fund?

More Overlap Than You Might Think

The numbers tell a clear story over the long run. Over the past five years, Applied Materials has a correlation of 0.69 with the S&P 500. In simple terms, that’s a high degree of overlap. It means a large share of the stock’s day-to-day price swings move in the same direction as the broader market. This isn’t a knock on its quality. The company has delivered an impressive annualized return of 29.9% over that period, far outpacing the market’s 13.5%. Its risk-adjusted return is also higher, with a Sharpe ratio of 0.73 versus the S&P 500’s 0.62. But it’s not a diversifier. For comparison, its correlation to gold is just 0.15. Instead of zigging when the market zags, AMAT tends to move with it, just with more intensity. On days the S&P 500 rose over the past year, the stock captured about 302% of the gain. On down days, it absorbed about 233% of the loss. It’s less of a counterweight and more of an amplifier.

The AI Boom Meets a Supply Chain Squeeze

That amplified return is rooted in a powerful business story. The company is at the center of the global AI build-out. On its latest earnings call, management reported “record revenue and earnings” and boosted its outlook, now expecting its “semiconductor equipment business will grow more than 30% this calendar year.” This isn’t just wishful thinking; the company says its largest customers are providing “rolling 8-quarter forecasts,” giving it unprecedented visibility into future demand. The bull case is clear: AMAT is a primary arms dealer for the AI revolution. But there’s a critical risk. The company’s growth isn’t limited by demand but by its ability to deliver. Management was candid that the main bottleneck is the supply chain. As the CEO noted, “it takes time for the supply chain to respond.” This creates a tension between the significant opportunity and the real-world constraints of manufacturing and logistics.

How to Position Applied Materials Now

So, what does this mean for you? Applied Materials is a high-quality, high-volatility way to increase your exposure to the semiconductor cycle, which is currently being accelerated by AI. It is not, however, a tool to diversify away from the market you already own. Think of it as adding a bigger, more powerful engine to your car, not a second engine that runs on a different kind of fuel. Given its tendency to magnify market moves, it’s a stock to be sized with care, not chased on the strength of one good week. The same forces that make it soar can make it fall harder in a downturn. The single most important signal to watch from here isn’t the stock price but the company’s execution. Keep an eye on any commentary about its supply chain. Its ability to navigate those constraints will determine how much of this historic AI demand it can actually turn into revenue.

So How Should You Hold A Stock Like Applied Materials?

Owning a strong performer is one thing; holding it in a way that fits the rest of your portfolio is another. The job is to size each position to the return it adds and the volatility it carries, so a single hot name never comes to dominate the risk you are taking. The Trefis High Quality (HQ) Portfolio is built on exactly that discipline, pairing the upside of strong businesses with the stability of a 30-stock portfolio, rebalanced with intent, and a track record of outperforming the S&P 500, S&P Mid-cap, and Russell 2000. Building a portfolio around how assets actually behave together, rather than which one ran hardest last week, is how you grow wealth while smoothing the ride.