如果月度定价实行，实际上就基本等同于完全采用现货价格，钢厂的原材料成本波动就将更为剧烈。
If monthly pricing practices, actually the basic equivalent to completely using spot price fluctuation, steel mills in raw material costs will be more intense.
完全市场条件下的欧式期权定价已有受欢迎的B - S定价公式，有交易成本的不完全市场期权定价还没有解决。
There have been European option pricing formulas in complete market. However, option pricing with transaction cost has not been solved.
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