Latest / Stock Picking with Fexingo: Individual Equities, Research, and Building a Concentrated Portfolio / The Case for a Three-Fund Core Portfolio in 2026
Transcript
- Lucas: So the S&P 500 sits near 7,660, the Dow just crossed 53,000, and the Russell 2000 is finally above 3,000 again. That's a market where a lot of individual stock pickers are feeling pretty good. But I want to talk about something that feels almost counterintuitive today: the three-fund portfolio. Luna: The three-fund portfolio? Isn't that the ultimate boring, index-heavy approach? We've got a show literally called Stock Picking with Fexingo. Lucas: Exactly, and that's why I want to make the case for it as the core of even a concentrated portfolio. Look, I love picking individual stocks. But the data keeps showing that a simple mix of three index funds beats most active managers over time. And right now, with small caps finally joining the rally, the case gets even stronger. Luna: What's the three-fund portfolio exactly? I know the basics, but for someone who's been picking stocks like we do, walk me through it. Lucas: It's famously associated with Jack Bogle and the Bogleheads. You hold three funds: a total US stock market index fund, a total international stock index fund, and a total bond market index fund. That's it. You set your allocation based on your age and risk tolerance, rebalance once a year, and let compounding do the work. Luna: And the classic advice is that the percentage of bonds should be roughly your age, right? So at 30, you'd have 30 percent in bonds? Lucas: That's the old heuristic, but in 2026, with bond yields back to levels we haven't seen in over a decade, that might actually make sense again. The ten-year Treasury is yielding around 4.2 percent right now. That's real income. For a long time after 2008, bonds were just a drag. Now they serve their purpose again. Luna: So you're saying even a die-hard stock picker should hold some bonds? That feels like heresy in a market where the S&P is up over 20 percent in the past twelve months. Lucas: That's exactly the point. When the market's been on a tear, that's when you need to lock in some ballast. And it's not about predicting a crash. It's about having dry powder and reducing volatility so you don't panic-sell when things drop. Remember how the VIX spiked in April this year? If you had no bonds, you probably felt every single point. Luna: True. And let's look at the recent numbers. Meta is up 5.4 percent in just five days, while NVIDIA is down 3.3 percent. That kind of divergence within the S&P 500 is exactly why the total market index might be smarter than just loading up on tech giants. Lucas: Right. The S&P 500 is up 0.2 percent over the last five days, but that masks a lot of movement underneath. Over the past year, the Magnificent Seven drove most of the gains. But this August, small caps have been catching up. The Russell 2000 is up 0.3 percent this week, and over the past month it's outpaced the S&P. That's a healthy broadening, but it also means you can't just buy the top ten stocks and expect the same returns. Luna: So the three-fund portfolio captures that automatically. You're not trying to predict which style wins next. Lucas: Exactly. And that's where I want to bring in a specific framework. For someone who's building a core-satellite approach — where the core is passive and the satellite is your stock picks — I'd suggest a 70/20/10 split. Seventy percent of your portfolio goes into the total US stock index, twenty percent into total international, and ten percent into bonds. But that bond piece is adjustable. If you're under 40, you could do five percent; if you're close to retirement, you might go to twenty. Luna: And what about the actual tickers? Are we talking Vanguard funds? Lucas: Yes, the classic ones. Vanguard Total Stock Market Index Fund — ticker symbol V-T-I. Vanguard Total International Stock Index Fund — V-X-U-S. And Vanguard Total Bond Market Index Fund — b n d. All three have expense ratios under 0.05 percent, which is essentially nothing. Over a thirty-year career, that tiny cost difference compounds into hundreds of thousands of dollars. Luna: But here's the thing — international has been a drag for years. Why would anyone want twenty percent in an international index? I've seen the Vanguard Total International Fund lag the S&P by a wide margin for a decade. Lucas: You're not wrong. International has been the laggard. But that's also a diversification benefit. Historically, US and international markets have taken turns leading. In the 2000s, international crushed the US. Since 2010, it's been the reverse. If you're building a portfolio for forty years, you want exposure to both. And there are signs that international might be turning around — the ECB is cutting rates, Japan is finally seeing wage growth, and emerging markets are getting cheaper. Luna: But isn't that a bit like market timing? Trying to catch the turn? Lucas: That's the beauty of the three-fund portfolio. You don't time anything. You set your allocation and rebalance. When international gets cheap, your regular rebalancing automatically buys more of it. When it gets expensive, you trim. It forces you to buy low and sell high without thinking. Luna: That's actually a really elegant way to think about it. But let's be real — our audience is here because they enjoy picking stocks. How do you reconcile that with a boring three-fund core? Lucas: It's the core-satellite model. You keep, say, seventy percent in the core, and use the other thirty percent for your stock picks. That way, you get the diversification and low costs of the index, but you still get the excitement, the research, the thrill of picking a winner like Meta last week. The key is to keep the core boring so your bets don't blow up your retirement. Luna: And that's a sensible way to approach it. But I still have a nagging question. The three-fund portfolio seems so simple. Why doesn't everyone do it? Lucas: Because it's boring. And because our brains are wired to think we can beat the market. We're overconfident. We fall in love with stories about NVIDIA or Tesla. The data, though, is pretty clear. Over the past twenty years, the S&P 500 index has beaten most actively managed funds, especially after fees. And the three-fund portfolio adds international and bonds, which smooths the ride even more. Luna: So it's almost like a financial maturity thing. You graduate from stock picking to recognizing that the market is hard to beat. Lucas: Exactly. And you know, that reminds me of something. We're able to have this conversation because of the listeners who support this show. It's completely funded by a small group of people who chip in monthly through buy me a coffee dot com slash fexingo. That's what keeps us independent and ad-free. And honestly, that's how we can spend an entire episode on something like the three-fund portfolio without being interrupted by a mattress commercial. Luna: It's a pretty good deal. You get a daily show about money, and you don't have to listen to ads. If that's worth a coffee a month to you, it goes a long way. Lucas: Alright, back to the portfolio construction. So we've got the core allocation. But there's a practical question: where do you actually hold these funds? A taxable brokerage account or a tax-advantaged retirement account? Luna: That's a crucial distinction. Bonds are typically better in tax-advantaged accounts because their interest is taxed as ordinary income. And international funds can be more tax-efficient in taxable accounts because of foreign tax credits. Lucas: Right. And that's where it gets a bit more nuanced than just picking three funds. But the core principle remains: keep your asset allocation across all accounts as one unified portfolio. Don't put a hundred percent bonds in your IRA and a hundred percent stocks in your brokerage. That throws off your rebalancing. Luna: So what's a typical breakdown if someone has both a 401 and a brokerage account? Lucas: Say the total portfolio is $100,000. You want 70 percent stocks, 20 percent international, 10 percent bonds. In your 401, you might hold the entire bond allocation and some US stocks. In your brokerage, you'd hold the international fund and the rest of the US stocks. That way, you're tax-efficient and your rebalancing is simple — you just adjust within each account. Luna: And how often should you rebalance? I've heard annual rebalancing is enough. Lucas: Annual is fine. But if a position drifts by more than five percentage points, rebalance sooner. In 2026, we're seeing some big shifts. Small caps have gained, value stocks have outpaced growth in the last month. If you started the year with a 70/20/10 split, you might be at 72/18/10 now. That's not a big deal. But if tech booms again and you end up at 80/12/8, you might want to trim some winners. Luna: And trimming winners is hard. That's where discipline really matters. Lucas: It's the hardest part, honestly. Nobody wants to sell a stock that's been on a tear. But that's the whole point of rebalancing — you're systematically taking profits from the asset class that's done well and buying the one that's lagged. It's the closest thing to a free lunch in investing. Luna: So, for our listeners who are die-hard stock pickers, what's the one thing you'd tell them to consider today? Lucas: I'd say look at your portfolio and ask yourself honestly: if I weren't allowed to look at individual stock prices for the next ten years, would I be comfortable with my current allocation? If the answer is no, you probably have too much in individual names. Start building that three-fund core. You don't have to do it all at once. You can move ten percent at a time over the next few months. But start now, while the market is at all-time highs. That's actually the best time to diversify. Luna: Because you're locking in gains and preparing for the inevitable bumps. Lucas: And when the next downturn comes — and it will — you'll be glad you have that boring bond fund and that broad international exposure. You'll sleep better, and you'll be less likely to make a panic move. That's worth more than any stock pick. Luna: Well said. And maybe that's the real lesson — investing isn't just about picking winners, it's about building a portfolio that lets you stay in the game. Lucas: Exactly. And speaking of staying in the game, we're heading into September, which has historically been a choppy month for stocks. If you've got a solid core, you can actually enjoy the chaos.