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Risk of Portfolios
So far, we have seen the application of standard deviation in the context of risk in single investment. But usually most investors hold portfolios of securities. Hence a very pertinent question that needs to be asked is, "What happens when two or more securities are combined in a portfolio?", the answer to which once again involves standard deviation.
the president of a certain firm concerned about the safety record of the firms employee sets aside $50 million a year for safety education. the firms accountant believes that more
Importance of official statistic
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calcation
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