I lost money on a semiconductor stock once because I didn't understand what the company actually made. I bought it because someone on a forum said "gallium nitride" and I thought, sure, sounds futuristic. It was not my finest moment. So when Navitas Semiconductor dropped 12% today on a rough second-quarter report, I paid attention.

Navitas makes gallium nitride and silicon carbide power chips. Those are the fancy next-gen materials that handle higher voltages more efficiently than standard silicon. They go into fast chargers, electric vehicles, solar inverters, that kind of thing. The promise is real. The timeline to profitability is a different conversation.

The second-quarter numbers spooked people. Revenue came in lighter than Wall Street wanted. Guidance wasn't exactly inspiring. The stock got punished, and when a small-cap semiconductor name misses, it doesn't drop 3 or 4 percent. It drops double digits because the margin of safety is thin and the expectations were already baked into the price.

I don't own Navitas. I've never owned Navitas. But I watch these semiconductor pullbacks because they're educational. You learn a lot about your risk tolerance when a stock you're researching drops 12% in a single session and you have to sit with the question of whether you'd have panicked.

Warren would say no. Warren would say he only buys profitable companies with decades of operating history so this entire conversation doesn't apply to him. And he's right, in his boring Warren way. But some of us like to understand the newer names even if we never pull the trigger.

The thing with companies like Navitas is that the technology genuinely matters. Gallium nitride chips are faster and more efficient than silicon. The market for them will grow. But "the technology matters" and "the stock will go up" are two very different statements, and a lot of people learn that the expensive way. A bad quarter doesn't mean the science is wrong. It means the business hasn't figured out how to turn good science into consistent revenue yet.

If you already own it, you're down today and you're deciding whether to hold or cut. If you don't, the pullback might look interesting but you'd better understand what you're buying. Not just "power chips go brrr." You need to understand the financials, the cash burn rate, the competitive landscape.

My S&P 500 index funds have semiconductor exposure built in. I get the upside of companies like this without having to pick the winner, which is probably where I'll stay for now.