本帖最后由 叶少 于 2016-1-13 09:39 编辑
Option Fundamentals 期权基础知识 “Regardless of what the underlying instrument is, there is one absolute regarding options: there are only two basic types (or classes). They are:
CALLS-- A call option gives its owner the right to BUY the underlying security at a specific price for a limited period of time.
As a rule, purchasers of call options are bullish, expecting the underlying asset's price to rise in the period leading up to the option's specified expiration date. Conversely, sellers of calls are usually bearish, expecting the price of the underlying asset's to fall--or, at the least, remain stable--prior to the option's expiration. However, there may be other reasons for selling calls, such as the structuring of strategies like spreads.
“无论是基于何种标的资产，期权只有两种基本类型：看涨期权和看跌期权。
看涨期权——看涨期权买方有权在规定期限内，以特定价格买入标的资产。一般来说，看涨期权买方认为当前是牛市，在期权到期前标的资产价格会上涨。相反，看涨期权卖方认为当前是熊市，期权到期前标的资产价格会下跌或者至少持平。但是，卖出期权也有其他原因，比如构建价差策略。
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