“Never buy a stock immediately after a substantial rise or sell one immediately after a substantial drop.”

Graham的The Intelligent Investor一書的第8章講市場波動最後作了一個“概括”，在這一小節裡最後指出市場的參與者常犯的兩個大錯誤，那就是：He should never buy a stock because it has gone up or sell one because it has gone down. 兩個because都是斜體字。

應該把華爾街這句座右銘貼在電腦前：
“Never buy a stock immediately after a substantial rise or sell one immediately after a substantial drop.”