That regulation already exists, at least for international trade. The act of selling items at less than nominal cost is forbidden by anti dumping treaties. See

That regulation already exists, at least for international trade. The act of selling items at less than nominal cost is forbidden by anti dumping treaties. See https://en.m.wikipedia.org/wiki/Dumping_(pricing_policy) https://en.m.wikipedia.org/wiki/Dumping_(pricing_policy)