The financial system consists of financial intermediaries, such as commercial banks, and financial markets, such as the stock market. This is further explained below.
<h3>What are financial 
intermediaries?</h3>
Generally, financial intermediaries are simply defined as Banks, building societies, and unit-trust companies are all examples of financial intermediaries.
In conclusion, Institutions like commercial banks and marketplaces for trading financial instruments like stocks and bonds make up the financial system.
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Answer: C. equal zero
Explanation:
The mean is average of the portfolio which means that some securities will be more than the mean and some will be less. 
Some deviations will be positive, others will be negative. 
When these deviations are added together, the negative deviations will cancel out the positive deviations which will lead to the average deviations being 0.