When an investor uses a Bull Put Spread they are buying a put option and selling a lower strike put option of the same underlying asset and expiration date. This strategy is used when the investor expects there to be a moderate rise in the price of the underlying asset. The maximum risk for this trade is the difference between the strike prices less the credit received. The maximum reward is limited to the credit received.A bull put spread is an options strategy used when the investor expects a moderate rise in the price of the underlying asset. The bull put spread is an options strategy used when the investor expects a moderate rise in the price of the underlying asset. The bull put is an options strategy used when the investor expects a moderate rise in the price of the underlying asset. The bull is an options strategy used when the investor expects a moderate rise in the price of the underlying asset. It is created by buying a put option with a lower strike price and selling a put option with a higher strike price. The trade is entered into when the difference between the two strike prices is less than the premium paid for the options.