Holding concentrated stock positions tilts the math against you.

Everyone thinks:

• Their company is special
• Their insight is special
• Their timing is special

It usually isn’t.

Over long periods, the most common outcome for an individual stock is going to zero.

The favorable, asymmetric return distribution investors talk about…

…exists at the market level, not the single‑stock level.

In simulations, as volatility increases, outcomes get worse:

• 40% vol → ‑1% median return over 20 years
• 50% vol → ‑60%
• 60% vol → ‑87%

As stock volatility increases, so does the probability of permanent loss.

If you’re sitting on a concentrated position and taxes have kept you from diversifying, there are ways to de‑risk without triggering a massive tax bill.

That way, you can position yourself to capture the favorable asymmetric distribution of the market as a whole.