The very best investors don't even try to forecast the future. Rather, they seize such opportunities as the present affords them. Henry Singleton, chief executive officer of Teledyne Inc. from the 1960s through the 1980s, was one of these enlightened opportunists. The best plan, he believed, was no plan. Better to approach an uncertain world with an open mind. "I know a lot of people have very strong and definite plans that they've worked out on all kinds of things," Singleton once remarked at a Teledyne annual meeting, "but we're subject to a tremendous number of outside influences and the vast majority of them cannot be predicted. So my idea is to stay flexible." Then how many influences, outside and inside, must bear on the
