Buffett: Today, with Berkshire's stock price plummeting, I believe this is a very good opportunity.

Buffett said that there are things that others might be afraid of, but he is not afraid, especially in the financial industry. If Berkshire's stock price were to plummet by 30%, he would see it as a great opportunity and not worry. It's not that he has no emotions, but rather that he doesn't have an overly emotional reaction to stock prices. In times like these, decisions should be made using the brain and wisdom, not emotions.