Option types并推荐美股

NASDAQ:SPRD 展讯，业内分析专家强力推荐，手机芯片老2，目前10美元上下，年底看20美元


Buying a put: （买入看跌）
A Buyer thinks price of a stock will decrease.
Pay a premium which buyer will never get back,
unless it is sold before expiration.
The buyer has the right to sell the stock
at strike price.
Writing a put:（卖出看跌
Writer receives a premium.
If buyer exercises the option,
writer will buy the stock at strike price.
If buyer does not exercise the option,
writer's profit is premium


A Bull Call Spread requires buying call options at a lower strike price and writing call options at a higher strike price in order to reduce capital outlay on a moderately bullish outlook. Such a strategy would not be possible without multiple strike prices


you are buying an option, either a put or a call, you must enter a "buy to open" order. If you are writing an option, also referred to as selling an option, you must enter a "sell to open" order

Now, to exit an order, you need to close your options position. If you bought an option, you need to use a "sell to close" order, which is essentially like owning a stock where you sell it back into the market to close the position.
In summary, a person holding a short position (contract writer) can sell to open (enter a contract) or buy to close (close a position). A person holding a long position (contract purchaser) can buy to open (enter a position) or sell to close (close a position).