Which of the following is true of a covariance matrix?
A. The numbers on the diagonal are variances
B. The numbers on the diagonal are standard deviations
C. The numbers on the diagonal are all one.
D. The numbers on the diagonal are all zero
A
The diagonal numbers are variances. The off-diagonal numbers show the covariance between two variables.
15 . Consider a position in options on a particular stock. The position has a delta of 12 and the stock price is 10 . Which of the following is the approximate relation between the change in the portfolio value in one day, dP, and the return on the stock during the day, dx
A. dP=12dx
B. dP=1.2dx
C. dP=120dx
D. dP=22dx
C
If S is the stock price and the change in the stock price is dS, from the definition of delta we know that dP=12dS. This means that dP=12S(dS/S). dS/S is dx. In this case S=10 so that C is correct.
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Analyzing the market and the organization is one of the five strategic components of marketing management.
a. true b. false
As discussed your textbook, what does "SEO" stand for?
A. Search-Engine Optimization – Public relations practitioners use SEO to make sure that their organization's website comes up when stakeholders search for the company online. B. Search-Engine Organization – Public relations practitioners must work with their company's IT department to organize the search engines available to employees on their office computers. C. Suspicious Employee-Operatives – To enhance internal communication, public relations practitioners monitor the emails of suspicious employees, using technology to restrict employees' privacy. D. Super-Excited Officials – This is what all public relations practitioners need for a successful news conference. E. Standard Ethical Operations – These are guidelines for the ethical practice of public relations in a specific organization.