I need a help

how is the Dow Jones index constructed and how does it differ from the S&P 500 index

 

Explain the role of reinvestment rate in the context of yield to maturity

 

 

what is the difference between standard deviation of stock returns and beta?does standard deviation of stock return include beta risk

 

 

 

wwhat is a short sale?when would you execute a short sale 

 

Solve the problem attaced plz

 
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