本格雷厄姆[傳奇投資顧問] ，基本上說，市場就像是躁狂抑郁癥。 He put it in mathematical terms, but the metaphor was this: You have a business worth $5 million, and you have an equal partner called Mr. Market, who's affected by mood swings. 他在數學方面，但這個比喻是這樣的：你有商業價值500萬美元，和你有一個平等的伙伴所謂市場先生，誰受情緒波動。 One day, Mr. Market's feeling gloomy, he's sick of the business, and he offers to sell you his share for $500,000. 有一天，市場先生的感覺令人沮喪，他生病的業務，他愿意出售你自己份額為500000 。 Another day, it's the first day of spring, he thinks the business is super and he offers to buy your half for $10 million. 另一天，這是第一天的春天，他認為該業務是超和他提供購買您的一半1000萬美元。
There are times when the whole market is manic like that -- now is one good example.有些時候整個市場是這樣的躁狂-現在是一個很好的例子。 There are times when individual stocks are like that.有些時候個別股票是這樣。 And they can be manic for no reason, or for a good reason.他們可以瘋狂的沒有理由，或為一個很好的理由。 But these mood swings give opportunities to buy stocks at extremely low prices.但是，這些情緒波動的機會，給予買進股票以極低的價格。
