Warren Buffett’s definition of the market:

 “Mr. Market quotes a price at which he is willing to either buy your interest or sell you his.  Mr. Market is emotionally unstable. Some days, Mr. Market is cheerful and can only see brighter days ahead. On these days, he quotes a very high price for shares in your business. At other times, Mr. Market is discouraged and seeing nothing but trouble ahead, and quotes a very low price for your shares in the business.”