Module6 2.1和2.2题都同时提到futures/forward价格和利率的相关性。其中2.1的解析中“if futures price are positively correlated with int rates,futures contracts are more desiable than forwards.”怎么理解这句话？期货和远期的价格和int rates的变动不是有固定的关系吗？我看到PPT里面也有一个表格（correlation between the Futures price and int rate）。有点没听懂老师讲得这部分。
