The Bull Rankings scorecard — our quality-growth score is 64.2 / 100, built from three pillars scored 0–100: Quality 90, Growth 79, Value 37 (valuation is judged against sector peers). At today's price, our reverse-DCF read says the market is implicitly betting on free-cash-flow growth of over 60% a year next year, fading to 3% a year by year ten — a gauge of how much optimism is already in the stock.
The thesis
Teradyne’s stock has been a rollercoaster, swinging from $109 to $487 in a year, yet the fundamentals as of the quarter ended 2026-06-28 tell a story of relentless execution. The company’s revenue grew 57.9% year-over-year, a figure that would look absurd for most businesses but feels almost routine for Teradyne. The profit margin sits at 25.8%, a number that doesn’t just survive in the brutal semiconductor equipment market—it thrives. That’s the heart of the bull case: a business printing cash. Our model pegs the quality-growth score at 64.2/100, with Quality at 90 and Growth at 79—the strongest pillars in the room. The weakest? Value, at 37. Translation: Teradyne isn’t cheap, but it’s not pretending to be. It’s a compounder playing by its own rules, and the market is pricing in the assumption that those rules won’t change.
What the business actually is
Teradyne sells machines that test other machines—specifically, the semiconductors inside your phone, your car, and your cloud servers. The Semiconductor Test segment is the engine, accounting for the bulk of revenue, with products like the FLEX test platform and the J750 test system handling everything from microcontrollers to high-volume automotive chips. The Robotics segment, though smaller, is the wild card, building automation tools for factories and warehouses. The company’s customers span automotive, industrial, communications, consumer electronics, and even electronic gaming—markets where failure isn’t an option. Teradyne doesn’t just sell testers; it sells certainty, and that’s a product with pricing power.
Why it can (or can't) keep compounding
The durability case is written in the numbers. A 33.5% return on equity isn’t just good—it’s elite, especially in a sector where capital is cheap and competition is fierce. The profit margin of 25.8% isn’t a fluke; it’s the result of decades spent perfecting test systems that can’t be replicated overnight. The moat isn’t in the hardware—it’s in the software and the ecosystem. Competitors can build a tester, but they can’t replicate the decades of calibration data, the customer relationships, or the integration with foundries and OSATs that Teradyne has locked in. Our model’s signal—Durable high returns—isn’t just a label. The only way this breaks is if the semiconductor cycle turns, and even then, Teradyne’s diversified end markets give it more runway than most.
The valuation question
At $363.10, Teradyne trades at 49.8 times trailing earnings, a multiple that would make value investors wince if the growth weren’t real. The market isn’t just paying up for past performance—it’s betting on the future. Our reverse DCF says the price implies over 60% annual free-cash-flow growth (in year one, slowing to 3% a year by year ten). That’s not a forecast; it’s a dare. The actual revenue growth, at 57.9% year-over-year, is breathtaking but not infinite. The implied growth in the stock price already assumes Teradyne will keep outpacing the cycle, out-innovating rivals, and expanding margins even as competition heats up. The bulls will argue that’s exactly what’s happening. The bears will point to the $800 million in trailing free cash flow and ask how much more can be wrung from a business already this efficient. The tension isn’t in the data—it’s in the assumption.
The bear case
The strongest skeptic’s argument lives in the P/E ratio of 49.8. That’s not just expensive; it’s the kind of multiple that demands perfection. The semiconductor equipment cycle is notoriously volatile, and Teradyne’s growth is tied to it. If demand for chips softens—even temporarily—the revenue engine stalls. The beta of 1.79 means the stock tends to swing much harder than the market when sentiment shifts. The market has priced in a world where Teradyne’s growth is unassailable, but the semiconductor cycle has a way of humbling even the best-run companies. The concrete signal to watch? A revenue growth slowdown below 20% year-over-year. That’s the line where the compounding story starts to fray.
What would change our mind
Three things would force a rethink. First, a profit margin drop below 20%—a sign that pricing power is eroding or costs are spiraling. Second, a debt-to-equity ratio above 0.10—a signal that the balance sheet is no longer a fortress. Third, free-cash-flow growth stalling below 10% for two consecutive quarters, which would break the durability story. As of the latest quarter, none of these are happening. But if they do, the 64.2 quality-growth score would slip.