[单项选择]Stock A has a standard deviation of O. 5 and Stock B has a standard deviation of 0.3. Stock A and Stock B are perfectly positively correlated. According to Markowitz portfolio theory how much should be invested in each stock to minimize the portfolio’s standard deviation（）
A. 100% in Stock A.
B. 50% in Stock A and 50% in Stock B.
C. C. 100% in Stock

[单项选择]The mean and standard deviation of four portfolios are listed below in percentage terms. Using Roy’s safety- first criteria and a threshold of 4 percent, select the mean and standard deviation that corresponds to the optimal portfolio. Mean Standard Deviation（）①A. 14 20 ②B. 8 10 ③C. 19 28
A. ①
B. ②
C. ③

[单项选择]The mean and standard deviation of the net incomes for all companies making up a stock index is $ 3.5 million and $ 4. 2 million, respectively. If a random sample of 49 companies is taken from the index, the standard error of the sample mean is closet to:（）
A. $85714.
B. $500000.
C. $600000.

[单项选择]A portfolio manager adds a new stock that has the same standard deviation of returns as the existing portfolio but has a correlation coefficient with the existing portfolio that is less than +1. Adding this stock will have what effect on the standard deviation of the revised portfolio’s returns The standard deviation will:（）
A. increase.
B. remain unchanged.
C. decrease.

[单项选择]Nowadays, a standard for measuring power has changed. These changes foretell a new standard for measuring power. No longer will a nation’s political influence be based solely on the strength of its military forces. Of course, military effectiveness will remain a primary measure of power. But political influence is also closely tied to industrial competitiveness. It’s often said that without its military the Soviet Union would really be a third-world nation. The new standard of power and influence that is evolving now places more emphasis on the ability of a country to compete effectively in the economic markets of the world.
America must recognize this new course of events. Our success in shaping world events over the past 40 years has been the direct result of our ability to adapt technology and to take advantage of the capabilities of our people for the purpose of maintaining peace. Our industrial prowess(威力)over most of this period was unchallenged. It is ironic(有讽刺性的) that i
A. to draw the readers’ attention to a new standard for measuring power
B. to demonstrate America political influence in the word
C. to emphasize that effort must be made to strengthen the declining U.S. industrial base
D. to show American industrial prowess