The other thing that's happened now is that Warren Buffett said he wants to get into the municipal bond insuring business.

还有一件事,沃伦·巴菲特说,他希望介入市政债券保险这一领域

耶鲁公开课 - 金融市场课程节选

Warren Buffett said it was not my idea. We are not controlling margins if you have option exchanges.

巴菲特说这不是我的主意，如果你有,期权交易的话我们不会控制保证金的。

斯坦福公开课 - 经济学课程节选