The Temporal Math of the "Lost Decade"

I’m not being “fearful.” I’m being temporally efficient.

I’m fast approaching 60. There’s one risk no diversification can hedge: sequence-of-returns risk compounded by opportunity cost of time.

I have a “golden window” of 10–15 years of peak agency. Spending those years watching a portfolio crawl back to “break even” after a crash isn’t just a financial loss. It’s life-stage bankruptcy.

Call it 20–25 years remaining, give or take—base/bull/bear blended, healthspan-weighted. Sure, geriatric tech might stretch the tail. But the tail isn’t the point.

The first half carries the mass. The later years carry the noise.

Now imagine that money-can’t-buy time squandered—trapped in a crashed-and-burned market for a decade or longer. By the time the ashes settle, you’re not “back.” You’re just… older.

And even if I dodge a lost decade, would I feel any need to accumulate more wealth with 10-ish years of declining vitality ahead? Meh. Doubt it.

There’s no guarantee it’s only a lost decade, either. It could be longer.

In a nutshell: at my age, never waste your sharpest decade. Watching red.

The real risk isn’t the money. It’s the time.

I’m protecting the only non-renewable asset I have.

The kids playing with leverage have 40 years to recover from stupidity. I don’t.

That’s not bearish. That’s just math.