Every major investment theme eventually runs into a bottleneck.
During the internet boom, it was fiber-optic networks. During the first wave of artificial intelligence, it’s been GPUs and the enormous amounts of electricity needed to power massive data centers.
As I researched the next phase of AI - the Physical AI revolution - I kept coming back to one simple question: What’s the one component every robot absolutely can’t function without?
The answer isn’t another semiconductor.
It’s a permanent magnet.
That probably isn’t the answer most people would guess, but it’s one of the most overlooked investment themes in the market today.
AI may tell a robot what to do, but permanent magnets are what allow it to actually do it.
Without them, a robot can’t lift its arms, walk across a factory floor, or pick up a box. A drone can’t fly. An electric vehicle can’t move. Even many of the advanced defense systems being developed today rely on the same technology.
Permanent magnets are the heart of every electric motor.
And every robot needs a lot of electric motors.
The Muscle Behind The Movement
Think about everything a humanoid robot has to do. It has to balance on two legs, walk across uneven surfaces, climb stairs, open doors, and manipulate tools with incredible precision.
Every one of those movements depends on electric motors converting electrical energy into mechanical motion. Permanent magnets are what make those motors powerful, compact, and energy efficient.
A typical humanoid robot may contain 30 to 70 individual motors, requiring roughly one to three kilograms of high-performance permanent magnets. Some control the legs and hips. Others move the shoulders, elbows, wrists, fingers, neck, and torso.
Every time a robot reaches for a tool or carefully lifts a box, dozens of motors are working together simultaneously.
The same principle extends far beyond humanoid robots. Warehouse robots, robotic surgical systems, autonomous drones, industrial automation equipment, and even many advanced defense systems all rely on the same technology.
Artificial intelligence gives a robot its brain. Permanent magnets give it its muscles.
That’s why I don’t think this is simply a robotics story. It’s also an AI story, a defense story, an industrial automation story, and an electric vehicle story.
That brings us to another issue most investors rarely think about…
The Supply Chain Nobody's Watching
China doesn’t just manufacture a lot of permanent magnets. It dominates much of the global supply chain. After spending decades investing in rare earth mining, processing, refining, and magnet manufacturing, China now occupies one of the most strategic positions in the entire Physical AI ecosystem.
As demand accelerates for robots, drones, electric vehicles, fighter jets, missile guidance systems, and countless other technologies, that dominance becomes increasingly important.
It’s also one of the reasons the United States has begun investing billions of dollars to rebuild a domestic rare earth and permanent magnet supply chain.
Governments understand something many investors don’t yet appreciate…
Permanent magnets aren’t critical to just one industry. They’re becoming essential to AI, robotics, defense, aerospace, industrial automation, and countless other technologies.
When one component sits at the center of so many major trends, securing the supply chain becomes a strategic priority.
The goal is straightforward: build a secure domestic supply chain.
Unfortunately, that won’t happen overnight, but it does create a compelling long-term investment theme because there are surprisingly few publicly traded companies positioned to benefit.
That’s where investors need to be paying attention.
Where The Real Opportunity Is Hiding
Earlier this week, I suggested many investors are asking the wrong question by focusing on which company will build the winning humanoid robot.
Today, I’d take that one step further. Whether the eventual winner is Tesla (TSLA), Figure AI, Unitree, AgiBot, or another company we haven’t even heard of yet, they’ll all need permanent magnets.
That’s what makes this opportunity so interesting.
The companies supplying this critical layer of the ecosystem don’t have to predict the winning robot manufacturer. They simply need to supply an industry that’s going to grow dramatically over the next decade.
We’ve seen this pattern before. During the smartphone revolution, Apple captured most of the headlines. Some of the biggest long-term investment winners, however, were the companies quietly supplying components used in virtually every smartphone.
The Physical AI revolution could unfold the same way. The robots may capture the headlines, but the companies supplying the technologies that make those robots move could quietly become some of the biggest winners of the next decade.
Three Stocks to Watch
MP Materials (MP): Building a fully integrated U.S. rare earth mining and permanent magnet supply chain.
Materion (MTRN): Supplies advanced engineered materials used across aerospace, defense, semiconductors, and other high-tech industries.
Nidec (NJDCY): One of the world’s leading manufacturers of precision electric motors used in robotics, industrial automation, and electric vehicles.
P.S. While you’re mapping out the Physical AI supply chain, my colleague Nate Bear is live right now inside his FREE open house, but it closes tomorrow.
He’s already closed multiple winners this week, including an 85% gain on RILY and a 42% gain on SPCX, all in real time. Click here to join free before the doors close for good.
Here’s to the future,
Matt McCall
Editor, Market Insights
