11 Reasons I will sell a stock:

1: Thesis busted / I made a mistake

I was wrong on the moat $GRUB
Outside forces matter more than I thought $KMI
Management can't execute $TRIP
Brand deteriorates $UA
Company is being disrupted
2: Accounting problems

$LK is dead to me
3: Mega-acquisition I don't like

Big acquisitions tend to destroy value and distract management

AOL / Time Warner = poster child

Relative size of biz is important.

$100 billion biz buys a $3 billion biz = OK.

$4 billion biz buys a $3 billion biz = big deal
5. Culture Deterioration

Glassdoor rating plunge

Mass management exodus

Leadership transition isn't working out
6. Extreme valuation compared to the opportunity

Very high valuation + lots of room to run = OK

Very high valuation + running out of room to grow = watch out
7. Too Large of a position for me

I'm OK w/ 15% of my port being in amazing, low risk business like $MA / $AMZN

For an amazing, high-risk business like $TSLA, I'll cap it at 10%
8. Lost interest

If I no longer want to follow the company, I'll sell

$AX is a recent example
9. Company acquired

If a company gets bought out and it has a high likelihood of going through, I sell

I don't like it when this happens. I'd rather own a compounder for years instead of getting a 1-time gain.
10. I need the money for my personal life

Major purchase on the horizon (car, home repair, vacation) and I want to use stock gains to pay for it
11. Tax-loss harvesting

I'll sell losers that I've lost confidence in to lower my tax bill
All of these 'rules' are in the "when to sell" tab of my public spreadsheet

https://docs.google.com/spreadsheets/d/1y8quPLqAwNsBGvNUrJuMTqVwz-P59ms1A8ZDLE8Dc24/edit?usp=sharing
What did I miss?

When do you sell?
You can follow @BrianFeroldi.
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