请根据以下情景，用英语给马杰写封建议信。词数100左右。

Your best friend Ma jie is an outstanding basketball palyer in our school team, but now he is faced a problem. His parents require him to spend more time improving his grades. However, he has to spend more time working on his basketball skills. So, he doesn’t know how to solve the problem. He wants you to give him some advice.

金融衍生品是一种金融合约，合约的基本种类之一为互换，下列关于利率互换的说法错误的是( )。

A．利率互换是指交易双方约定在未来的一定期限内，根据约定数量的同种货币的名义本金交换利息额的金融合约
B．最常见的利率互换是在固定利率与浮动利率之间进行转换
C．当利率看涨时可将浮动利率债务类金融工具转换成固定利率金融工具
D．当利率看跌时可将固定利率资产类金融工具转换成浮动利率金融工具