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In options trading, a bull spread is a bullish, vertical spread options strategy that is designed to profit from a moderate rise in the price of the underlying security. Because of put-call parity, a bull spread can be constructed using either put options or call options. If constructed using calls, it is a bull call spread. If constructed using puts, it is a bull put spread. ==Bull call spread== A bull call spread is constructed by buying a call option with a low strike price (K), and selling another call option with a higher strike price. Often the call with the lower exercise price will be at-the-money while the call with the higher exercise price is out-of-the-money. Both calls must have the same underlying security and expiration month. If the bull call spread is done so that both the sold and bought calls expire on the same day, it is a vertical debit call spread. Break even point= Lower strike price+ Net premium paid 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「bull spread」の詳細全文を読む スポンサード リンク
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