Up to that point, it was the largest transaction of Railroad bonds in US History.

在那之前，这是美国历史上最大的铁路债券交易。

Soon, his banks had no money left. They could return no money to the thousands of people who had bought railroad bonds.

不久，他的银行就没有什么钱款剩下。他们无法向购买铁路债券的数千人返还钱款。