Have you face situation where you thought the company you bought was a good one, but few year later it's ROE start to degrade year by year. If sell the stock you lose money, do you wait or sell?

Q & AHave you face situation where you thought the company you bought was a good one, but few year later it's ROE start to degrade year by year. If sell the stock you lose money, do you wait or sell?
jason asked 6 years ago