Latest / Stock Picking with Fexingo: Individual Equities, Research, and Building a Concentrated Portfolio / How Tesla's Margin Compression Changes Valuation
Transcript
- Lucas: If our money conversations have helped you think about a decision differently, I want to tell you something simple. We deliberately don't run ads on these shows because we believe your attention should belong to the ideas, not the advertisers. Luna: And if you want to support that choice directly, the link is buy me a coffee dot com slash fexingo — that's F. E. X. I. N. G. O. Lucas: Exactly. It keeps us independent, which matters when we’re discussing sensitive topics like corporate capital allocation. Now, let’s look at Tesla. For years, the market priced this company based on future optionality—robotaxis, energy storage, humanoid robots. But right now, as of October 28th, 2026, the real story isn’t the robots. It’s the factory floor. Tesla’s automotive gross margins have compressed significantly, dipping below fifteen percent in recent reports, a sharp departure from the thirty percent peaks we saw a few years ago. Luna: That’s a massive drop. Did the volume increase compensate for the lower per-car profit? Lucas: It did, but barely. The volume surge came at the cost of pricing power. You can see it in the broader auto sector too. General Motors and Ford are both grappling with similar pressure, though their base costs are higher. Tesla started this cycle by cutting prices to maintain share, effectively forcing every competitor to follow suit. The result is an industry-wide margin erosion that didn’t exist two years ago. Luna: So we’re seeing a classic commodity trap where product differentiation disappears and price becomes the only lever left. Lucas: Precisely. And here is where most individual investors get stuck. They look at Tesla’s revenue growth, which remains solid, and assume the stock should still trade at a tech multiple. But when margins contract, the earnings per share growth stalls. If you’re holding a concentrated portfolio, you need to ask: does this company still have a moat, or has the moat dried up? Luna: I’d argue the moat hasn’t dried up; it’s just shifted from software branding to hardware efficiency. Lucas: That’s a fair point. Tesla’s unibody casting and vertical integration still give them a cost advantage over legacy makers. But the market is currently punishing them for that advantage being less pronounced than before. Look at the S&P 500 today—it’s up nearly one percent, driven largely by tech giants who haven’t faced this specific margin headwind. Tesla, despite its size, is trading more like a cyclical industrial right now. Luna: Right, and if you bought Tesla thinking it was a perpetual compounder, you’ve been caught off guard by the cyclicality of EV adoption. Lucas: Exactly. Let’s drill into the numbers. In Q3, Tesla delivered record volumes, but the average selling price dropped. When you combine a lower ASP with rising raw material costs for lithium and nickel, the margin squeeze accelerates. Investors often miss this until it hits the headline EPS number. By then, the stock has already repriced. Luna: So the lesson is to watch the margin trend line before you worry about the top-line revenue number? Lucas: Always. Revenue tells you how much stuff you sold. Margins tell you how hard it is to sell it. For a concentrated portfolio, you want businesses that can raise prices without losing customers. Tesla is currently struggling to do that because the alternatives—like the Hyundai Ioniq series or even Chinese imports—are becoming increasingly competitive. Luna: But doesn’t Tesla have the charging network as a sticky ecosystem feature? Lucas: They do, but the Supercharger network is also becoming commoditized. Other automakers are opening up their own networks or switching standards. The unique utility of that network is declining relative to the total cost of ownership calculation for the buyer. Luna: Interesting. So the defensive features are eroding just as the offensive pricing power is weakening. Lucas: That’s the double bind. And this brings us to a critical distinction in stock picking. Are you buying Tesla for its current cash flow generation, or are you betting on the AI narrative? Because those are two completely different valuation frameworks. Luna: Most people mix them up. They use DCF models for robotaxis but forget to discount the actual car sales risk. Lucas: Spot on. If you’re valuing the car business, you should be using a P/E ratio closer to Ford or GM, which trades around ten to twelve times earnings. If you’re valuing the AI option, you’re looking at forward revenue multiples. The problem is, the market doesn’t know which one it wants to price it as today. Luna: That ambiguity is exactly what creates volatility. It’s a binary bet masked as a steady compounder. Lucas: Right. And in a concentrated portfolio, you can’t afford that kind of uncertainty unless you’re fully aware of it. I’ve seen too many investors hold onto positions like Tesla simply because they refuse to admit their thesis has changed. They keep waiting for the margins to bounce back to thirty percent, ignoring the structural reality of the market. Luna: It’s easier to blame the macro environment than to admit the company’s competitive edge is fading. Lucas: Often. Let’s look at a counter-example. Consider NVIDIA. Their margins are expanding, not contracting. Why? Because they control the supply chain for the chips that power the very AI infrastructure everyone is talking about. They have pricing power. Tesla is a price-taker in a crowded market. That difference is everything. Luna: So we’re comparing a monopoly-like supplier to a commodity manufacturer. That changes the entire risk profile. Lucas: It does. When you build a concentrated portfolio, you want winners in each category. You want the high-margin monopolies like NVIDIA or Microsoft, and you want the efficient manufacturers like Berkshire Hathaway’s subsidiaries. But you need to know which bucket a stock belongs in. Luna: And stop trying to force a square peg into a round hole just because you already own the stock. Lucas: Exactly. Sunk cost fallacy is the enemy of alpha. If Tesla’s margin profile doesn’t match your growth criteria, you trim it. You don’t wait for permission from the market to realize you were wrong. Luna: Real talk though—does this mean we should avoid all EV stocks right now? Lucas: No. It means you pick the ones with pricing power. Some newer entrants are focusing on luxury segments where brand loyalty is stronger. They aren’t fighting the price war on the mass-market front. That’s a valid strategy, but it requires careful selection. Luna: So diversification within the EV sector might actually be smarter than going all-in on the leader. Lucas: In this specific case, yes. The leader is bearing the brunt of the disruption. A smaller player with a niche focus might preserve their margins better. But again, you have to do the work. You can’t just buy the ticker symbol. Luna: This really highlights why we need to update our research constantly. What worked in 2023 doesn’t work in 2026. Lucas: Absolutely. The landscape shifts fast. My advice? Focus on the unit economics. How much profit does each car actually make after incentives? If that number is shrinking, the stock is likely overvalued, regardless of how many robots Elon Musk tweets about. Luna: Unit economics first, narratives second. That’s the rule. Lucas: The golden rule. If the underlying business isn’t generating free cash flow efficiently, the story is just noise. We’re seeing this play out across the tech sector now, not just autos. Companies that grew too fast are suddenly exposed. Luna: It’s a harsh correction for those who forgot that growth eventually meets gravity. Lucas: Gravity always wins. The question is whether the company has enough fuel to climb out. For Tesla, the fuel is efficiency gains from new factories. For others, it’s innovation. You just have to measure which one is working. Luna: And if neither is working, you move on. No sentimentality. Lucas: No sentimentality. Capital is finite. Deploy it where the odds are highest. Luna: So, are you planning to adjust any positions in your own portfolio based on these margin trends? Lucas: I’m reviewing my exposure. If the margins don’t stabilize by next quarter, I’ll reduce the position. Better to have cash and wait for clarity than to hold a depreciating asset hoping for a miracle. Luna: Discipline over hope. That’s how you survive the bear markets. Lucas: Exactly. And that’s the takeaway for today. Watch the margins, respect the cycle, and never confuse past growth with future guarantees. Luna: Smart, specific, and actionable. Thanks for keeping us grounded, Lucas. Lucas: Anytime. Next time we’ll look at how energy storage is becoming the next battleground for margins. Luna: I’ll bring the spreadsheets. See you then.