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World stock prices fell on Wednesday after Germany approved new regulations to limit speculative selling of euro-dominated government bonds.
VOA: standard.2010.05.19
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I computed the average return on stocks over that time period and I computed the average return on bonds over that time period.
我计算了那个时间段的股票平均收益率,和债券平均收益率。
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The thing that is very interesting that he finds is the difference, 4%, between the historical real return on stocks and the historical real return on bonds.
非常有趣的是,他发现历史实际股票收益，和历史实际债券收益之间,存在4%的差异。
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So let's have a clicker question here on how many total pi bonds do you expect to see in benzene?
让我们来做个课堂习题,你们觉得苯环里有一共多少个π键？
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So, somewhere in between, the bonds are, we have a range of bonds between ionic on the one hand, and perfectly covalent on the other hand.
因此在中间，这些键，一方面是离子性，另一方面是完美的共价键。
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And something that we'll see later on is that triple bonds, for example, are going to be stronger than a corresponding double bond or a corresponding single bond.
而我们以后还会看到三键，举例来说，应该更强，相较于相应的双键,或者相应的单键来说。
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Underlying this analysis, we have estimates of the expected returns on assets, notably, the expected returns on stocks and bonds.
凭借这个分析，我们可以估算出资产预期投资收益，特别是股票和债券的预期收益。
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And when we talk about covalent bonds, there's 2 properties that we'll mostly focus on, and that's going to be thinking about the bond strength or the energy by which it stabilized when it bonds.
而当我们讨论共价键的时候，有两点特性是我们最关注的，那就是键的强度,或者说成键之后能量降低了多少。
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But because there's this lone pair here, it's pushing down on the other bonds, 5° so we end up with an angle of less than 109 . 5 degrees.
但因为这里有孤对，它会把其它键向下压，所以键角会小于109。
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The bonds are auctioned off on regular dates and you cannot participate in the auction; I assume you can't.
这些债券在规定期限内拍卖,你们不能参与这些拍卖,我想你们是不行的
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And then we end up having 6 shared electrons, 2 from each of the bonds, so we end up with a formal charge on sulfur of plus 1.
然后我们有六个共用电子，每个键两个，因此最终硫的形式电荷量为正一。
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They show the expected return on stocks versus bonds or short-term debt for a whole range of countries.
他们对这些国家的股票预期收益与,国债或者短期债券作出比较。
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In valence bond theory, the focus is on discussing the bonds, but it should look very familiar to you, because there's two types of bonds that we want to discuss here.
在价电子成键理论中，所关注的是讨论成键，但这对于你们来说应该很熟悉，因为这是我们要讨论的两种键。
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So since we have two lone pairs, we're going to be pushing down even further on the bonding electrons, so we're going to smoosh those bonds even closer together.
因为我们有了两个孤对，我们会把成键电子,更加向下压，所以我们把这些键更加紧得推到一起。
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It is showing since the U.S. Government issues these bonds, it's showing its data on these bonds.
这里显示了,因为这些债券是美国政府发行的,所以这里显示了这些债券发行的数据
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I can try other portfolios; this one right here--I'm pointing to a point on the pink line-- that point right there, 50% stocks, 50% bonds.
还可以尝试其它组合;,这一点，粉色曲线上我指的这一点-,表示50%的股票，50%的债券。
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I bought it for $1,000 on a website because I was interested in indexed bonds.
我用1000美元从网上买了下来,因为我对这种债券很感兴趣
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We were interested in finding bonds trading below par where we thought there was a chance that companies would not file their financial statements on time.
我们对发现以低于票面价值进行交易的债券很感兴趣,我们认为在没有按时发布它们财务报表的公司,时机有可能发现。
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This point right here is, on the pink line, is a portfolio 100% bonds.
粉线上的这一点，是一个100%债券的投资组合。
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That could be investor only in bonds or an investor only in stocks, but I also show on here what some other returns are that are available.
表示投资者只投资了债券或者只投资了股票，同时我在这里也展示了,其它可能性组合的收益。
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There was a huge rally in treasury bonds on October 19, 1987.
987年10月19日,长期国债的价格大幅上升
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What Siegel emphasized--the book is really about this-- he talks about what is the expected return of stocks and what is the expected return of bonds and so on.
西格尔强调的是。。。这书真正讲的是-,他讨论了什么是股票预期投资收益,以及什么是预期投资债券等等内容。
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So, for example, at an annual expected return of 12% if I have a portfolio of stocks, bonds, and oil I can get a standard deviation of something like 8% on my portfolio.
例如，在年预期收益12%的情况下%,我有股票，债券和石油的投资组合,在这个组合里,我的投资组合可以取到8%的标准差。
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I computed the returns on the stocks, bonds, and oil for every year from 1983 and I computed the average returns, which I take as the expected returns, I took the standard deviations, and I took the covariance.
我计算了从1983年以来每年的股票,债券和石油的收益，从而得出平均收益率，这些平均收益率作为预期收益率，然后算得标准差及协方差。
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