Average options suitable for those with regular income or the cost of hedging persons. 平均期权适合于那些具有经常性的收入或费用的避险者。
The purpose of derivatives is hedging, risk diversification, but it is their own lack of transparency, the lack of supervision, including the futures market. 衍生工具的目的是避险,分散风险,但其做法是本身不透明,缺乏监管,包括期货市场。