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I wrote my first book--I already talked about that, Pioneering Portfolio Management--that deals with the challenges that face institutional investors.
我写的第一本书,我已经提到过了,《机构投资的创新之路》,讨论了机构投资者所面临的挑战
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.. I computed the efficient portfolio frontier for various-- it's the efficient portfolio frontier using the formula I just gave you.
我计算了来自不同组合有效边界-,这一条有效投资组合边界,就是用刚刚给出的公式算出来的。
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There's no correlation between them ... and that means that the variance-- and I want to talk about equally-weighted portfolio.
它们之间没有相关性,也就是说。。。方差-,我想讲一下,权重相等的投资组合。
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What I did in this diagram is I computed the efficient portfolio frontier-- now it's the blue line with three assets.
在这张图表中,我计算了有效边界-,蓝色线表示三种资产的组合。
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.. I can achieve any combination-- I can achieve any point on that by choosing an allocation of my portfolio.
我可以得到任意组合-,可以任意分配投资组合中,各种投资的比重。
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In my diagram, I said that the tangency portfolio-- I estimated that the tangency portfolio is 9% oil, 27% stocks, and 64% bonds.
在我的曲线图里我有提到切线资产组合-,我估算出切线资产组合是9%的石油，27%的股票和64%的债券。
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It's actually kind of a crusade of mine-- I believe that the world needs more portfolio diversification.
事实上，这是我长期研究的一个方向-,我认为，世界需要更多元化的投资组合。
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But I'm talking here--this is the actually the frontier-- the best possible portfolio consisting of three assets.
但在这里我说的是-,边界表示了三种资产最好的组合。
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Here I was, back at Yale, with a billion dollar portfolio -it seemed like a lot of money at the time no portfolio management experience.
那时我在耶鲁,要管理上十亿美元的投资组合,在当时,那是笔巨款,而我却没有任何投资组合管理经验
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In fact, I have it--suppose we have three assets and we want to compute the efficient portfolio frontier, the mean and variance of the portfolio.
事实上，假如我们拥有三种资产,我们想计算有效边界，及投资组合的均值和方差。
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I've made a very special case that this is the case of an equally-weighted portfolio.
在这里我假设了一个特例,即一个各项资产权重相等的投资组合。
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This is a year of financial crises, so I'm warning you ahead that -don't expect a 28% return on the Yale portfolio for the coming year.
金融危机爆发,所以我先提前给大家打预防针,别期望今年耶鲁基金,能延续28%的收益
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2% You could say, I think my portfolio has an expected return of 12%-- that would be better than if it had an expected return of 10%.
如果一个投资组合的预期收益率有-,那就比一个只有10%的投资组合要好。
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I'm not going to put Yale's entire portfolio in Google stock, I'm not going to go back and take Yale's entire portfolio to day-trade bond futures; in part, because it would be bad for me personally.
我不会用耶鲁的全部资产买谷歌股票,我也不会,用耶鲁的全部资产买债券期货,一方面是因为,这对我个人不利
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Finally, I just want to say, next lecture is January twenty-eighth and we're going to talk about portfolio diversification, which is one very important application of the fundamental principle of risk management, as applied to securities.
最后，我想说下一讲是在1月28日,到时我们会谈谈资产组合多样化，这是风险管理基本原则中,对证券投资来说，这是非常重要的一项应用。
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That's not a way that we really think about it, but I do believe that the risk level of the University's portfolio is really quite low in statistical terms -much lower than the risk level that you'd have if you had a traditional portfolio dominated by marketable securities.
这一般不是我们考虑的关键,但我相信,耶鲁投资组合的风险水平,在统计数字上是非常低的,远远低于,持有一个传统的可交易证券主导的,投资组合的beta系数
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