The lower two strike prices are used in the bull spread, and the higher strike price in the bear spread.

在牛市价差中使用较低的两个执行价格，在熊市价差中使用较高的执行价格。

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You also can choose from an array of strike prices and expiration dates depending on your appetite for risk.

你还可以从一系列行权价格和到期日中做选择，具体取决于你的风险承受意愿。

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The problem comes when the market crashes and prices drop below the strike price of the option.

但当市场崩溃、资产价格跌落到行权价格以下时，问题就出现了。

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Other put options with large open interest include those at 4800 and 4900 strike prices.

FORBES: Locals Shorting India Stock Market

This is a popular tactic since, if you pick the right strike prices, you're not out any cash.

FORBES: Investment Strategies

To be sure, if you confine yourself to listed options, you may not find exactly the maturities and strike prices you want.

FORBES: Another Option