Will there be times where I have to accept and take a loss? When will I know that it's time to exit instead of holding on?

I Sell a stock when

1. It longer meets the fundamental reason I went in for

2. Fundamentals of the company changed (different business model/direction/taking on businesses that are not their expertise)

3. Significantly short term over valued

One good question to ask yourself is...
Know what I know today, will I buy the stock now, if the answer is a resounding no, it is clear you have lost confidence in the business. Find opportunity to cut your losses and move on. The opportunity cost is huge

Hi,

Depends on your risk, you can decide when to consider to sell, maybe when stock price drops 15%? 10%? or 20%? of your cost price. I use 15% btw and I just use it, no reasons.

Another factors to note is to determine whether its fundamentals changed or not. ​​​