Episode summary
He Asked 25 Finance Pros How They Invest Their Own Money: Brian Portnoy on What the Models Get Wrong
Excess Returns
· · 57 min · Hosts: Matt Zeigler · Guests: Brian Portnoy
Summary
Brian Portnoy argues that investing is “solved” only in the narrow sense that broad, low-cost, liquid market access is widely available; beyond that, every portfolio is still personal, messy, and tied to changing life circumstances. The book’s 50 essays show that people who know markets well still arrive at very different answers because they are solving for family needs, career risk, peace of mind, and the kind of life they want to live.
He highlights recurring patterns: entrepreneurial investors often lean hard into their own businesses, some contributors hold no bonds at all, others keep large cash reserves, and many have paid off mortgages or intentionally carried little debt. Portnoy and the host emphasize that these choices often look suboptimal in a spreadsheet but are behaviorally optimal because they are easier to live with and more consistent with what matters to the investor.
The conversation also broadens “investing” beyond securities to include human capital, social capital, and wisdom. Portnoy says the point is not to find one universal model, but to compound the forms of capital that actually support a well-lived life.
Key takeaways
- Brian Portnoy says broad index investing is effectively solved, but the deeper question of what success means is not solved at all.
- The book’s central lesson is that 50 smart investors use the same raw materials—stocks, bonds, cash, homes, businesses—yet build radically different portfolios.
- Portnoy argues that many contributors hold more cash than standard models suggest because sleep-at-night value beats return maximization.
- The discussion frames paid-off mortgages and cash reserves as behaviorally optimal for many investors even when they look inefficient on paper.
- Portnoy says entrepreneurial contributors often bet heavily on their own businesses because they believe they have an edge and want to express it.
- The episode argues that investing should include compounding human, social, and wisdom capital, not just financial capital.
Notable quotes
“I think yes in the sense that here 2026 almost 2027 um the the every person's ability to gain broad market access”
“human beings are works in progress who mistakenly think they're finished”
“I don't have it exactly in front of me, but she starts out by basically saying, um, I'm so conservative”
“I hold ungodly sums of cash. I could do some napkin math on you know were I to put you know sort of that incremental cash into a market index”
How the episode opens
You're watching Excess Returns, the channel that makes complex investing ideas simple enough to actually use where better questions lead to better decisions. It's my honor to have this guest back to talk about an updated edition of a book. Better than an updated edition.
It's a new a new variation on the book, How I Invest My Money, Volume 2. It's out now, which means Brian Portoroy in a fantastic lavender cover. What can I call this color?
You and the book are here. You're in the room. Hold it up, Brian.
So, I put on Instagram the other day, is this lilac or lavender? — Oo, now we're into the questions I care about. — I don't, you know, now now she'll, I guess, have to be a listener, but Rachel Cameron at Nitrogen chimed in and says it is absolutely lilac. Lilac lilaced. Yeah, I'm convinced.
Yeah. So, thank you, Rachel. — Thank you, Rachel, for the real questions that we want to talk about here. — So, volume two. Why did you want to do a volume two to this book?
I don't know if I did. Um um Herman House, you know, the the publisher of our our little hamlet uh and many people in it, uh called up a couple years ago, maybe a year and a half ago, and said, "Hey, you know, the first volume's just been a big success in terms of sales and translations into other languages and wonderful reviews. And it's sort of uh you know written or it's built in a way where you could sort of run it back as many times as you want because you know the first volume was you know intro and outro and 25 contributions in between.
And so Craig Pierce at at Herman House on a serious note said hey we'd love for for you to uh dig in find 25 more contributors.
From the episode’s captions: roughly the first two minutes, lightly cleaned. Keep watching on YouTube →
Topics
- index funds vs active choices
- asset allocation and risk tolerance
- cash reserves and career risk
- paying off mortgages vs opportunity cost
- alternative investments and illiquidity
Companies and tickers mentioned
- Shaping Wealth
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Summary, takeaways and quote selection by Octagon. Quotes are short excerpts; the full conversation is in the episode.
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