However, the analytical solutions to the optimal portfolio problem are not obtained generally in practical market. What we can do in general is to get the approximations of this problem.

由于现实中组合最优化问题的解析解一般是无法求得的，所以通常能做的是求解问题的近似解。

youdao

By adding WAS CE to the WebSphere portfolio, our customers and partners can choose the application server technology appropriate to the problem they are trying to solve.

通过将WAS ce添加到WebSphere组合中，我们的客户和合作伙伴可以选择适用于他们正在解决的问题的应用服务器技术。

youdao

So that's the expected return and efficient portfolio frontier problem.

这就是预期收益，和有效边界问题。

youdao

I want now to carry that forward into something a little bit more focused on the portfolio problem.

现在从这个基础上拓展一下,更侧重于投资组合方面的问题。

耶鲁公开课 - 金融市场课程节选

I'm transferring this to the portfolio management problem and you can see it's the same idea.

如果将保险转化为投资组合管理的问题,你会发现原理是一样的。

耶鲁公开课 - 金融市场课程节选

So that's the expected return and efficient portfolio frontier problem.

这就是预期收益,和有效边界问题。

耶鲁公开课 - 金融市场课程节选

The problem: There was no portfolio.

WSJ: How Mutual Funds and Managers Massage Their Numbers, Legally

If someone told me they wanted to buy the Vanguard Total Stock Market ETF as compared to the Vanguard Total Stock Market Total Mutual Fund--both happen to share the same portfolio--I would have no problem with that, provided they held it for the rest of their life.

FORBES: Intelligent Investing Briefing Book

The hardest problem with drug stocks for a portfolio manager is to avoid selling.

FORBES: Pfizer versus Merck