inverted pyramid. He starts by selecting a very volatile stock and he sends out 1,000 letters. Half predict it will rise and half that it will fall. The 500 that got the correct prediction get letter #2 with a different volatile stock. The 250 that now have two correct predictions get letter #3 and so on. By letter #6 you have 15 or 16 marks who have gotten six letters in a row with your infallibly accurate predictions. Most will be begging by then to be taken.
