Forecasting of prices


In my casual chat with a supervisor in the purchasing unit of the General Services department, I learned that they do a kind of prices forecasting for some items that they order. For example, the coupon bond paper sometimes fluctuates in prices and it is usually high in the first part of the year since it is the time for inventory. They stock up on such supplies by August or September when the prices are considerably low. And since paper is not perishable, it is okay to stock up on it.