Abstract: Terminals on the buyer side and the seller side intercommunicate with a host to execute a processing of cross trading by subscription based on purchase information issued on the buyer side, a processing of cross trading by subscription based on selling information issued on the seller side, and a processing of trading where a plurality of pieces of purchase information is collated with a plurality of pieces selling information and commitments are made one by one in order of agreement. Since the generally called future delivery trading can be made on a network, both the buyer side and the seller side can make a selling plan or a purchasing plan without going to a wholesale market and can make a transaction of commodity by using their own terminals. The buyer side and the seller side can be provided with more chance than ever and can make commodity exchange more efficiently.

Abstract: This invention provides a continuous hot rolling process for making thin strip in which it is possible to roll strips at high rolling speeds required to keep a finisher delivery temperature equal to or higher than an Ar.sub.3 transformation temperature. The gist of the present invention resides in a continuous hot rolling process in which the rolling speed of a final finishing mill is kept constant or slightly increased until the leading end of rolled strip travels from the final finishing mill to a down coiler which process comprises: rolling a predetermined length of the leading end portion of a stock being rolled in accordance with a strip thickness greater than a finished thickness; then reducing the strip thickness to the finished thickness by gauge alteration in rolling; and subsequently rolling the following portion.