中东战争是什么:求金融英语翻译？？

Speculating in bonds is a little different.What speculators do here is watch both the price of the bond and the return it is giving.If interest rates go up,the price of bonds will go down and vice versa.What the bond speculator does is try to buy the security prior to the time that interest rates decline.Thus,a $1,000 bond that is selling at $500 and pays 4 percent of the face value or $40 a year is returning 8 percent at the current price.
If the speculator believes that interest rates will drop and the average bond will pay only 7 percent,a purchase of the bond is in order.After all,for the return to drop from 8 percent to 7 percent the price of the bond will have to rise to $571.You can check this
arithmetic by merely dividing $40 by $571 to arrive at a return of 7 percent.
原本是一段内容，只是我第二段不会翻，就单辟了一段，麻烦高人帮忙翻译第二段！
另外帮忙看看这7呀，571的都怎么出来的，谢谢了！
堵一楼的嘴，涨到200!不就100分吗，有的是！真正的高手是不讲究这个的，都以答题为乐，不弄这小儿科！
分虽然是虚拟的，但对高手的真材实学是一种肯定！！
呵呵，今天话多了些，还有我不太接受用翻译软件搬过来的答案，要是那样的话我费这劲干嘛！