THE MECHANIC’S PORTFOLIO

(STRL), (PSIX), (POWL), (AGX)

I’ll never forget this supply convoy I was part of in Iraq. We had all the shiny new vehicles with digital dashboards and enough electronics to make NASA jealous. But when we got hit, every fancy system went dark. 

It wasn’t the high-tech gear that got us moving again. Instead, it was the old-school mechanics who could fix an alternator with a paperclip and a prayer. 

That day taught me something the markets keep proving over and over: the difference between what looks impressive and what actually works when the chips are down.

Fast forward to today, and that same lesson is playing out on Wall Street. Everyone’s chasing the next AI miracle stock or dissecting Elon’s latest tweet while a few unglamorous industrial names quietly build the backbone that keeps the convoy moving.

Take Sterling Infrastructure (STRL). If this company were in that convoy, it’d be the guy with the toolbox and a calm grin. With an $11 billion market cap, Sterling is in charge of wiring the data centers that power it. 

Their E-Infrastructure Solutions segment grew 29% last quarter, not because of financial engineering, but by literally building the electrical systems that feed those power-hungry servers. 

In a market obsessed with “what’s next,” Sterling keeps delivering “what’s now:” more than 200% returns in 18 months, 400 basis points of margin expansion, and a $2 billion backlog that’s practically a growth roadmap. 

Power Solutions International (PSIX) is the ultimate contrarian’s delight. This 40-year-old powertrain manufacturer spent years in obscurity before suddenly putting up numbers that made hedge funds look twice. The stock soared 685% in 12 months – and not by luck. 

They’ve beaten earnings estimates five quarters in a row while raising guidance each time. CEO Dino Xykis reported 74% sales growth and 138% higher net income year-over-year. Before you can train trillion-parameter models, you need dependable engines and generators. PSIX silently built that reliability while the market was busy chasing shiny objects. 

Then there’s Powell Industries (POWL), the grown-up in the room. After an 800% run since early 2023, most companies would be coasting. Powell’s still executing. 

They manufacture the electrical infrastructure that powers everything from semiconductor fabs to industrial plants and hyperscale data centers. Q3 gross profit hit $88 million with margins at 30.7%, and international revenues jumped 39% thanks to growth in Canada, the Middle East, and Africa. 

Finally, Argan (AGX). This is the quiet powerhouse with a balance sheet so clean it squeaks. $527 million in cash, zero debt, and a $2 billion backlog heavily weighted toward natural gas projects that keep AI infrastructure humming 24/7. Renewable energy may be the dream, but data centers don’t sleep. 

When the power grid falters, it’s Argan’s natural gas turbines that keep the lights – and the algorithms – on. 

Their latest earnings showed record revenues, with 61% of backlog tied directly to large-scale baseload projects. Basically, Argan is the classic “picks-and-shovels” play in the AI gold rush.

What unites these four isn’t profitability but proven competence. The risk, naturally, is that these stocks have already completed their initial assault phase. 

Powell and Sterling alone have delivered returns that would make cryptocurrency enthusiasts go UA from their day jobs. But infrastructure buildouts typically last years, not quarters, and we’re still in the reconnaissance phase of the AI-driven construction boom. 

The question isn’t whether demand will continue – it’s whether these companies can execute their mission while maintaining the operational discipline that got them this far.

After all, I’ve seen what happens when discipline slips. In combat, it gets people killed. In markets, it kills portfolios. The tools change, the stakes don’t. 

Whether you’re fixing a convoy truck in the desert or wiring the backbone of the digital economy, success still depends on the same fundamentals: the right tools, steady hands, and the will to keep going when everyone else panics. 

Because in the end, the mission’s the same: keep it running, keep it moving, and bring everyone home in one piece. That’s true for convoys and for capital. Semper Fi.