Number of policies doesn't affect the means but it affects that standard deviation, so it becomes very collapsed and this is the basic core idea of insurance.

保单的数量并不影响其均值,但是会影响其标准差,所以这条曲线非常陡峭,而这就是保险的核心原理

耶鲁公开课 - 金融市场课程节选

They have a formula that defines how much Tier I and Tier II capital a bank has to hold and the amount depends on the risk class of their investments.

有一个公式可以计算出,一个银行到底需要持有多少一级和二级资本,其数量取决于他们投资项目的风险等级

耶鲁公开课 - 金融市场课程节选

If you start with only one, you have two pieces of DNA, then you'll get 2 to the Nth fragments after N cycles because each cycle you're doubling the number.

如果你从仅仅一个DNA开始,你有两条DNA链,经过N次循环后,就得到二的N次方个DNA片段,因为每次循环都使其数量翻倍

耶鲁公开课 - 生物医学工程探索课程节选

They must be looking at some measure of the value of the company and dividing by the number of shares and then that gives them some idea of what the share is worth.

他们必然会对公司的价值有一定衡量,用其除以股票数量,然后大致得出每股价值

耶鲁公开课 - 金融市场课程节选

I bought a number of two-period bonds such that the value of my purchase exactly equals the proceeds that I get from shorting the one period bond, so I've made a zero wealth transaction.

我买入了一定数量的两年期债券,其成本刚好等于我卖空,一单位一年期债券获得的资金,我做的是零成本交易

耶鲁公开课 - 金融市场课程节选