问题如下：
A trader thinks that the price of a stock currently priced at USD 70 will increase. The trader is trying to choose between buying 100 shares and buying European call options on 1,000 shares. The options cost USD 7 per option and have a strike price of USD 70 with a maturity of six months. Explain the difference between the two trading strategies.
解释：
The option trading strategy is considerably riskier as indicated by the following table:
