option strike price的意思|示意

What is a lower bound for the price of a four-month call option on a non-dividend-paying stock when the stock price is $28, the strike price is $25, and the risk-free interest rate is 8% per annum?

什么是一个较低的一个非，股息，支付的股票四个月呼叫选项的价格势必当股票的价格是$ 28，行使价$ 25，无风险利率每年8％？

An option with a strike price equal to the underlying futures price.

一个期权的执行价等于其原生期货的价格。

It is a kind of option strategy that the investor buy and sell the same type of two options which have the same expiry date but with the different strike price.

投资人在同一时间买进和卖出同一类期权，此两个期权到期日相同，但执行价格不同。

A call is option that gives the buyer the right, but not the obligation, to purchase the underlying futures contract at the strike price on or before the expiration date.

看涨期权赋予买方以权利，但不必负有义务，在期权到期日当天或到期之前，按敲定价格买进相关期货合约。

The strike price of an option times the number of underlying securities in the contract.

选择权合约交易的数量与单位履约价格的乘积；

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。