股票市场中最优质股票类别。通常是上市时间较长，具优秀盈利、派息及往绩的大型上市公司。

Companies have a long and stable record of earnings and dividends. They are issued by large and well-established firms that have impeccable financial credentials.

youdao

一方面，我们有这样的例子，有的公司拥有两种，不同类别的股票，他们在经济意义上是相同的。

On one level, there are things like companies that have two. Different classes of stock that are economically identical.

youdao

这一策略可以多种形式实施：股票配期权、同一股票的两个类别互配、各种大宗商品进行组合搭配，或用受同一力量影响的任意两项资产进行配对交易。

The strategy can take numerous shapes, matching stocks with options, two classes of the same stock, commodities against each other or just about any two assets that are affected by the same forces.

youdao

On one level, there are things like companies that have two . different classes of stock that are economically identical.

一方面，我们有这样的例子，有的公司拥有两种,不同类别的股票，他们在经济意义上是相同的。

耶鲁公开课 - 金融市场课程节选