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 BuffettYou will be right, over the course of many transactions, if your hypotheses are correct, your facts are correct, and your reasoning is correct. True conservatism is only possible through knowledge and reason.
Warren BuffettYou ought to be able to explain why youโre taking the job youโre taking, why youโre making the investment youโre making, or whatever it may be. And if it canโt stand applying pencil to paper, youโd better think it through some more. And if you canโt write an intelligent answer to those questions, donโt do it.
Warren Buffett