Send us a textIn markets, there are few principles considered more important by traders than the idea that when a commitment to a deal is made, it should stand come what may. So, there was uproar in the commodities market last week over the London Metal Exchange’s decision to bring the global nickel market to a halt and cancel futures trades because of a “short squeeze” on a Chinese tycoon facing potential billions of dollars of losses.In one of the most controversial moments in its 145-year ...