Stupid Investment Trick: Why the Fear of a 15% Tax Is Destroying Your Portfolio

We’ve all heard the complaint as the year winds down: "I can’t believe the taxes I’m going to owe on this!"

An investor decides to sell a wildly successful stock to free up cash or simply rebalance their portfolio. The gain is substantial, and the immediate thought is dread over the capital gains bill.

Please. Don’t complain.

While complaining might seem harmless, there is a severe, real-world consequence: If the prospect of paying a modest tax keeps you anchored to investments you should have sold months ago, this stubbornness exposes your entire portfolio to catastrophic, stock-specific risks.

The True Cost of Concentration

This fear of taxation is why people allow winners to balloon into massive, concentrated bets that dominate their portfolio.

Imagine a modest investment in Oracle that ballooned to 25% of your portfolio. Entering September 2025, you might have felt like a genius with shares hitting $310. Fast forward to today, and if the AI trade shows cracks and Oracle shares drop by one-third (down to $200), guess what else is down? Your entire portfolio.

Concentration risk is real, and it is a risk you willingly bear because you are paralyzed by the thought of writing a check to the IRS.

Reframing the "Onerous" Capital Gains Tax

Truthfully, the capital gains tax is not all that onerous—it’s quite generous.

For long-term capital gains (securities held more than a year), the rate is just 15% for most filers. This is the maximum rate most of us pay, and it can be lowered further by strategically selling any losing positions to offset your gains.

There is a powerful case to be made that a 15% tax is cheap, especially when you consider that income from capital gain is passive income. You didn’t have to lift a finger to earn it. By comparison, you must show up every day, every week, and pay a much higher ordinary income tax rate on your regular wages.

The Apple Example: Stop Complaining, Start Winning

Let’s put this into perspective:

• Investment: $10,000 into Apple at the beginning of 2014.
• Current Value: $148,000.
• The Tax Bill: Liquidating the position triggers a long-term capital gains tax of about $21,000 (at the 15% rate).
• The Net Gain: $117,000, free and clear.

If someone told you that you could make over $100,000 over a decade without lifting a finger, you would jump at the chance! But when that logic is removed from the hypothetical, the fear of that $21,000 check holds investors back from banking the $117,000 gain. This is the definition of a Stupid Investment Trick.

Net, net: If you have a gain, don’t complain—take it, pay the taxes, and thank your lucky stars you live in an economy that can make you rich passively.

As Steve Miller famously advised: Take the money and run.