Strangle is a strategy that involves purchasing a put option and a call option at different strike prices. When a strangle is purchased, the strategy is profitable when there is a large swing in the underlying's price in either direction. Purchasing a strangle is generally cheaper than purchasing a straddle. In contrast, selling a strangle is profitable when the price of the underlying does not move sharply in any direction and selling a strangle generates less of a credit than selling a straddle.
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