Treveri Capital · Concentrated Position Analysis

One stock. How much of your future is riding on it?

Whether it came from years of holding, a grant schedule, or a company that went public, the problem is the same. Most people delay diversifying because the tax bill looks unbearable. This shows you both numbers side by side: what selling costs, and what not selling risks.

March 27, 2000

Cisco was the most valuable company in the world.

No fraud. No collapse. No scandal. It sold the hardware the entire internet was built on, it had real customers and real profits, and every serious person agreed it was the safest way to own the future.

The stock traded to $82 that day and then lost roughly 90% of its value.

It did not trade back to $82 until December 2025.

It has gone higher since. That is the part people point to when they tell me it worked out in the end, and they are right. The money came back.

CSCO monthly close, March 2000 to December 2025
$82 Mar 2000 Dec 2025 down about 90% 25 years, 9 months 2000 2013 2025

Illustrative chart of monthly closes. Past performance does not indicate future results.

The twenty five years did not. If you were 45 that spring, you were 70 before the position was worth what it had been. You cannot compound what you do not have, you cannot retire on a recovery that arrives at 70, and no return schedule gives you those years back. Cisco was fine. The people who owned too much of it were not.

You do not have to be wrong about the company to be wrong about the size of the bet.

Nobody who has been right about a stock for years can see a price problem coming. Being right for a decade stops feeling like luck and starts feeling like evidence. That is exactly how a position gets this large. It got large because you were right.

Big wave surfers spend their whole lives chasing the perfect wave.

And nobody who paddles out at Mavericks thinks the ocean is going to be fair to them.

That is the whole point. They go anyway. But they go with an inflation vest, a leash they can release, a partner on a ski, and a route to the channel decided before the set comes. None of that is fear. It is the price of being allowed to surf waves that size for twenty years instead of two.

The ones who get hurt are almost never the ones who respected it. They are the ones who caught a hundred clean waves and quietly stopped preparing for the one that closes out.

I am not telling you to get out of the water. I am asking what your plan is for the wipeout.

Below you will see what the tax would actually cost to fix this, next to what a decline would cost if you do not. Most people are surprised which number is bigger.

Your position
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Readout
0%in one stock
Position value
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Unrealized gain
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What selling costs vs what holding risks

Both bars are drawn to the same scale.

Tax if you sold the whole position this year —
One time. Known in advance. You choose when it happens.
Loss if the stock falls 50% —
Not a forecast. An illustration of what one stock can do.
And it does not take a 50% decline
Down 30%
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Down 40%
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Down 50%
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Nobody who lost it saw it coming

Every person who ever rode one stock down believed in that company. They were not reckless. They were right, for years, and they were rewarded for it. That is the part people miss. The position got this large because you were correct.

The risk was never that the company is bad. It is that one decision, made by people you will never meet, in a room you are not in, can reprice your entire life before lunch. A missed quarter. A contract that does not renew. A competitor. A short report. A change of mind about what the whole sector is worth.

None of that requires the business to fail. It only requires the market to change its mind.

You do not have to be wrong about the company to be wrong about the size of the bet.

The tax bill is the price of making that bet smaller. It is a number you can see, plan around, and spread across years. The other number arrives on a Tuesday with no warning, and it takes the retirement date with it.

This has happened to better-positioned people than you or me
The company fails

Enron in 2001. Lehman in 2008. Both were blue chips the week before. Anyone holding a large position did not get a warning, and did not get a second chance. This is the version everyone already knows about, and it is the one people assume could never happen to the stock they own.

The second one is the risk almost nobody prices in, because it does not require anything bad to happen to the company. It only requires the market to have paid too much once. You cannot know from the inside whether that is happening now, and neither can I. That is the entire reason position size matters.

Federal long-term capital gains
Net investment income tax (3.8%)
California income tax
Total tax on a full sale this year
Effective rate on the gain

Federal only. Your state's tax on this gain is not included, so the real total is higher.

Get the multi-year version

The number above assumes you sell everything in one tax year, which is the most expensive way to do it. Spread the same sale across several years and the bill usually drops a lot.

Send me your numbers and I will email you what the same sale costs spread over three, five, and seven years instead of one, using your income and filing status. It is the math, not a recommendation. What is actually right for you depends on things this form does not ask, which is what a conversation is for.