You shouldn't own common stocks if a 50 per cent decrease in their value in a short period of time would cause you acute distress.
Warren BuffettI don't try and guess when to get in and out of the market. I have owned stocks consistently since 1942. I owned the - I was buying stocks the day before the election. I was buying the same stocks the day after election. And if Hillary had been elected, it would have been the same thing.
Warren Buffett