“You must sell when people are typically in an optimistic frame of mind, when people are still enthusiastic about what’s happening. You can never sell into weakness. The time to sell usually is when a whole lot of people are highly enthusiastic about the stock. The flip side of that is the time to buy is when everyone has written off a business, written off a company, written off a sector. That one is much easier to implement. Selling is much tougher because the human mind is not hardwired to do that. You get caught up in the enthusiasm.”