motels last year and five new motels this year) or slowing down (five last year and three this year). For stocks of companies such as Sensormatic Electronics, whose sales are primarily “one-shot” deals—as opposed to razor blades, which customers have to keep on buying—a slowdown in growth can be devastating. Sensormatic’s growth rate was spectacular in the late seventies and early eighties, but to increase earnings they had to sell more new systems each year than they had sold the year before. The revenue from the basic electronic surveillance system (the one-time purchase) far overshadowed
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