问题如下：
Tim, an trader of an investment company trade on margin at a price of $60 per share, he purchased 300 shares of a non-dividend-paying stocks. The leverage ratio is 3. After three monthes the market price of share is $65, Tim then sells these shares. We assume that there are no transaction costs and no interests paid on the borrowed amount. Which of the following statements is correct?
选项：
A.The return to Tim during the three-month period was 20%.
B.The return to Tim during the three-month period was 8.33%.
C.The return to Tim during the three-month period was 25%.
解释：
C is correct.
The equity contributed by Tim (the minimum margin requirement) is \(\frac{100\%}3=33.33\%\)
Tim contributed 33.33% of $60 per share is $20.
The return is , because the gain is 5 ($65-$60) per share
您好：1.这里面trade on margin 怎么翻译 怎么理解，是公司交保证金60，还是市场价market price 60；2.可否这样算：65到60，return是上涨了8.3%，在乘以leveraged ratio 3 ，得出25%。谢谢。
