The Philosophical Investor's Blog

The Power of a Platform: Andy Roddick Style

Gary Carmell Andy Roddick

At least six months ago, Heather saw something on Instagram that she knew would get my attention. Andy Roddick was going to host an immersive tennis experience. I was immediately intrigued.

There were two reasons. First, I’ve always thought Andy was an incredibly bright and cerebral person.

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The Magic Mountain and the Return of Power

Sovereign Dominance

My decision to begin reading Thomas Mann’s The Magic Mountain was inspired, at least in part, by my late father. I have a distinct childhood memory of him reading this enormous book and, perhaps even more vividly, of the satisfaction he took in having finished it.

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Tempus Probat Omnia: The Price of Capital

Cost of Capital

One of the great challenges of investing is resisting the temptation to reduce a complex world to a single explanation. We crave narratives because they make decision-making easier. Interest rates are rising because inflation is rising. Apartment values are falling because the Federal Reserve raised rates.

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The Day the Buffer Snapped: Why Long-Term Rates, Credit Spreads, and the Yen Carry Trade Exploded

The Day the Buffer Snapped: Why Long-Term Rates, Credit Spreads, and the Yen Carry Trade Exploded

For four decades—from Paul Volcker’s inflation-crushing rate peak in 1981 all the way to 2022—investors operated in a world defined by a single, unbreakable trend: long-term interest rates were moving down.

Throughout those 40 years,

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When the Price of Capital Sends a Warning

real interest rates

For much of the past decade, investors and borrowers became conditioned to believe that interest rates were primarily a function of Federal Reserve policy. If the Fed lowered short-term rates, longer-term borrowing costs would eventually follow. If inflation moderated, bond yields would decline. That framework was never completely accurate,

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The Seven-Day Green Streak: What Ibiza Taught Me About Recovery, Stress, and the European Reset

Ibiza Effect Whoop Data

For anyone who tracks their health data, there is a distinct, satisfying feeling when your wearable lights up green. It is an objective nod from your body that your nervous system is balanced, your heart rate variability is up, and your resting heart rate is down.

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Banksy, Bond Yields, and the Art of Productive Paranoia

Gary and Heather Paris Sept 10, 2026

While attending the GRI conference in Paris recently, I found myself reflecting on a disconnect between what I was seeing with my own eyes and what I know higher interest rates are intended to accomplish.

Everywhere Heather and I went,

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The Audacity of Scale: What Real Estate Leaders Can Learn from JFK Airport’s Master Stroke

JFK-Airport-from-Idlewild-Golf-Course

There is a distinct magic in stepping out of a world-class venue and into a global transit hub, reflecting on the sheer physical ambition it takes to make both exist in a world-class city. Sitting in the grandstands at the U.S. Open in Flushing Meadows and then heading home through John F.

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The Enemy Inside the Walls: My Two-Month Experiment in Heart Health

Cardiovascular biomarkers

For most of my adult life, I assumed I was doing a pretty good job of protecting my heart. I exercise regularly, I don’t smoke, my blood pressure has generally been excellent, my resting heart rate is low, and I have remained physically active enough to play vigorous tennis well into my 60s.

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Reframing Defeat - The Hidden Longevity Victory Behind an Absolute On-Court Thrashing

Tennis Sprint Interval Training

There is an unmistakable, humbling weight to a match where, as it unfolds, you realize your opponent is simply better than you in every conceivable phase of the game.

It wasn’t just that I was losing points; it was the realization of total mastery across the board.

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