As a value investor , when do you sell?

Great thread. Personally I find it easier to decide when and what to buy than when and what to sell.
My sell decisions have nothing to do with my buy price. I have 3 triggers to sell:

1. Loss of confidence in the business or the management.
2. Massive overvaluation, thus reducing the prospects of returns even with blue skies scenario.
3. Requirement of capital to invest in a much better opportunity.

Conceptually these may be sound, but getting it right is still not easy at all. I suppose it’s inevitable that in a long investment journey, there will always be some that were dumped too soon and some that were held too long.