The more volatile the share, the higher this premium since the share is more likely to rise above the option's strike price.

ECONOMIST: Corporate finance

In option trading, the strike price and liquidity are key considerations.

FORBES: Using Options to Trade Double Tops

Buy a put option with a strike above the current price of the index and write a simultaneous put option that has the same expiration month although with a lower strike.

FORBES: Optional Opportunity

In the case of the oil company, for instance, the cost of land corresponds to the premium (or down-payment) on a call option, and the extra investment needed to start production to its strike price (at which the option is exercised).

ECONOMIST: Economics focus

CBs are trading so far beneath their strike price that the option is worthless.

ECONOMIST: Life after debt?

With the strike price of the option set a long way above prevailing levels, they will have reckoned they could convert the debt into equity at ever giddier prices.

ECONOMIST: Life after debt?

Calls are option contracts that can give buyers an inexpensive bet that a stock will rise above a specified "strike price" before a specified date.

WSJ: Upside: Options for Nervous Investors