The commodity for a long time was grain. That’s originally what was going on on the Chicago Exchange, and then you had pork bellies and a variety of other agricultural goods. The idea was that at the point that the futures contract expired, you would deliver the goods.
If yes, done. If no, say what's wrong. Let the agent fix it.，这一点在Line官方版本下载中也有详细论述
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Priorities shaped by history