Mr. Market. He is your hypothetical business partner who is daily willing to buy your interest in a business or sell you his at prevailing market prices. Mr. Market is moody, prone to manic swings from joy to despair. Sometimes he offers prices way higher than value; sometimes he offers prices way lower than value. The more manic-depressive he is, the greater the spread between price and value, and therefore the greater the investment opportunities he offers.
