Physical AI is the next bottleneck. Software stocks have skyrocketed, but for humanoid robots to become a reality, the real bottleneck is the "actuator" — which accounts for 70% of the cost of a humanoid robot.

Here are 4 US stocks that each control different parts of this Physical AI bottleneck:

1⃣ Novanta ($NOVT)
Makes the three core components inside actuators: motors, encoders, and torque sensors. Highest risk but also highest potential reward.

2⃣ Moog Inc. ($MOG-A)
Established precision actuator manufacturer, driven by dual demand from defense and robotics.

3⃣ Timken ($TKR)
Bearings and motion control, basic components needed for every joint of a robot.

4⃣ Vishay Precision Group ($VPG)
Precision sensors that allow robots to "feel" force and position.

🔑 Core logic:

Jensen Huang says humanoid robots are a $40 trillion market. But everyone is chasing the robot-making companies (Tesla Optimus, Figure AI); the real alpha is in the component supply chain — just like NVIDIA in the AI chip boom, this time the picks-and-shovels play is actuators.

Software is no longer the bottleneck; the bottleneck of Physical AI is hardware: heat dissipation, power consumption, mechanical precision, and reliability. These companies are the ones solving these problems.