To Lz:
Not so sure on what perspective you are talking about so-called "zero-game". About derivatives, it really depends on what type of instruments you are talking about, it may or may not be a "zero-game". Admittedly, Mr. Buffett doesn't like that sh*t, but it's not necessary to say he has never used it. About this point, I can't confirm it but I personally don't believe he never used any derivative for any purpose.
"从风险管理角度看,期权应该是实现双赢,而不是表面的零和" --- Don't know where you get it, but don't think it's right.
"从衍生工具起源来看,当初正是因为管理风险的需要而产生,虽然现在功能有些改变,但是本质上还是应该以风险管理为主,买卖双方根据对收益和风险的不同态度和承受能力" ---- Agree from one way
"在转移收益的同时,也转移了风险" ---- Depends on what instrument you are talking about
"单纯的从期权收益来看,并不能得出其实际功能上的作用。从整个宏观上来看,衍生产品交易使得收益和风险在整个市场范围内再分配,促进了流动性, ----- Agree. Especially from the stability of the financial system's perspective
买卖双方都从中达到自己目标,显示是双赢的结果。 ---- Not so sure I will agree