问题 多项选择题

假设甲、乙证券收益的相关系数接近于零,甲证券的预期报酬率为6%(标准差为10%),乙证券的预期报酬率为8%(标准差为15%),则由甲、乙证券构成的投资组合()。

A.最低的预期报酬率为6%

B.最高的预期报酬率为8%

C.最高的标准差为15%

D.最低的标准差为10%

答案

参考答案:A, B, C

解析:

投资组合的预期报酬率等于各项资产预期报酬率的加权平均数,所以投资组合的预期报酬率的影响因素只受投资比重和个别收益率影响,当把资金100%投资于甲时,组合预期报酬率最低为6%,当把资金100%投资于乙时,组合预期报酬率最高为8%,选项A、B的说法正确;组合标准差的影响因素包括投资比重、个别资产标准差以及相关系数,当相关系数为1时,组合不分散风险,且当100%投资于乙证券时,组合风险最大,组合标准差为15%,选项C正确。如果相关系数小于1,则投资组合会产生风险分散化效应,并且相关系数越小,风险分散化效应越强,当相关系数足够小时投资组合最低的标准差可能会低于单项资产的最低标准差,而本题的相关系数接近于零,因此,投资组合最低的标准差会低于单项资产的最低标准差(10%),所以,选项D不是答案。

填空题

[A] He is unlikely to produce such a big hit in the near future, so more of his attention is directed to revising the old song and selling it to more people.

[B] Back in the 1950s, he says, performers got only one-tenth of the share of royalties that they do now. For years, artists have, with good reason, accused big record labels of ripping them off.

[C] This month, early recordings by Elvis himself started to enter Europe’s public domain. Over the next few decades a torrent of the most popular tracks from the Beatles, the Rolling Stones and many other artists will become public property in Europe—to the pleasure of fans and the consternation of the music industry.

[D] The music industry also points out that America gives artists almost twice as much copyright protection as Europe. America has repeatedly lengthened copyright terms, with the latest reprieve, the Sonny Bono Copyright Term Extension Act of 1998, giving performers protection for 95 years after publication.

[E] But when the attention is shifted from Europe to America, artists should feel much better because the length of copyright protection there is even shorter. It seems that the American government is more interested in serving the public than the already very rich artists.

[F] Music executives want the European Commission to protect them from such unwelcome come competition by extending the copyright term.

[G] And that estimate accounts only for songs up to the end of the 1950s. Far more will be at risk as music from the 1960s and 1970s moves out of copyright.

"Every three months from the beginning of 2008," says Cliff Richard, who was once Britain’s answer to Elvis Presley, "I will lose a song." The reason is that in most European countries copyright protection on sound recordings lasts for 50 years, and (now) Sir Cliff recorded his first hit single, "Move It", in 1958. (41) ______

One of the big four music firms estimates that about 100m "deep catalogue" (ie, old) albums now sold in Europe each year will have entered the public domain by the end of 2010. Assuming a current wholesale price of $10, that could jeopardise $1 billion of revenues, or about 3% of annual recorded music sales. (42)______

Even once much of the back catalogue has entered the public domain, the big music firms can carry on selling it on CD. They will even benefit from not having to pay anything to the artist or to his estate. They will in many cases still own copyright on the original cover art. But they will face new competition from a host of providers of CDs who may undercut them. And on the internet, public domain music is likely to be free, as much of the copyrighted stuff already is on peer-to-peer networks.

(43)______Artists have rallied to the cause: U2, Status Quo and Charles Aznavour all want the 50-year limit increased. Many more acts will sign a petition this spring. Sir Cliff has spent hours complaining to the commission that composers of songs get copyright for 70 years after their death: more than performers.

(44)______

Many people believe that America has gone too far in protecting copyright at the expense of the public good, including, it seems, the commission, which said last year that it saw no need to lift its own 50-year limit. Its deadline for proposals on copyright law has slipped from this year to 2006. But governments are likely to weigh in on the issue. France, Italy and Portugal have indicated that they support an extension of the term, and Britain is likely to stick up for its own music major, EMI.

Although artists and their estates want longer copyright, the big music firms would benefit from it the most, especially in the next couple of decades, says Stephen King, chairman of the Association of United Recording Artists and manager of the Libertines. (45)______ Now they have wised up about making deals. The best guarantee of financial security—safer than clinging on to copyright—is hiring a good lawyer early on.

42()

单项选择题