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Credit spread (options)
In finance, a credit spread, or net credit spread, involves a purchase of one option and a sale of another option in the same class and expiration but different strike prices. Investors receive a net credit for entering the position, and want the spreads to ''narrow'' or expire for profit. In contrast, an investor would have to pay to enter a debit spread. In this context, "to narrow" means that the option sold by the trader is in the money at expiration, but by an amount that is less than the net premium received; in which event the trade is profitable but by less than the maximum that would be realized if both options of the spread were to expire worthless.
==Bullish strategies==
Bullish options strategies are employed when the options trader expects the underlying stock price to move upwards. It is necessary to assess how high the stock price can go and the time frame in which the rally will occur in order to select the optimum trading strategy.
Moderately bullish options traders usually set a target price for the bull run and utilize bull spreads to reduce cost. (It does not reduce risk because the options can still expire worthless.) While maximum profit is capped for these strategies, they usually cost less to employ for a given nominal amount of exposure. The bull call spread and the bull put spread are common examples of moderately bullish strategies.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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