1. One stock has traded at an average price of $50 over the course of a tradingday. The covariance...

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1. One stock has traded at an average price of $50 over the course of a trading

day. The covariance of successive transaction price changes is about XXXXXXXXXXUsing the Roll model, what is the estimate of1. One stock has traded at an average price of $50 over the course of a trading

day. The covariance of successive transaction price changes is about XXXXXXXXXXUsing the Roll model, what is the estimate of the bid-ask spread of the stock (measured in percent of the

average price of $50)?

2. The market index has average return 7% and standard deviation 30%. The

risk-free rate is 3%. A portfolio has beta 1.4, unsystematic variance of 0.03,

and an M2-measure of XXXXXXXXXXWhat is the average return on the portfolio?the bid-ask spread of the stock (measured in percent of the

average price of $50)?

2. The market index has average return 7% and standard deviation 30%. The

risk-free rate is 3%. A portfolio has beta 1.4, unsystematic variance of 0.03,

and an M2-measure of XXXXXXXXXXWhat is the average return on the portfolio?1. One stock has traded at an average price of $50 over the course of a trading

day. The covariance of successive transaction price changes is about XXXXXXXXXXUsing the Roll model, what is the estimate of the bid-ask spread of the stock (measured in percent of the

average price of $50)?

2. The market index has average1. One stock has traded at an average price of $50 over the course of a trading

day. The covariance of successive transaction price changes is about XXXXXXXXXXUsing the Roll model, what is the estimate of the bid-ask spread of the stock (measured in percent of the

average price of $50)?

2. The market index has average return 7% and standard deviation 30%. The

risk-free rate is 3%. A portfolio has beta 1.4, unsystematic variance of 0.03,

and an M2-measure of XXXXXXXXXXWhat is the average return on the portfolio?return 7% and standard deviation 30%. The

risk-free rate is 3%. A portfolio has beta 1.4, unsystematic variance of 0.03,

and an M2-measure of XXXXXXXXXXWhat is the average return on the portfolio?

Sumit · Accepted Answer

1. Given:
Average Price = $50
Covariance of Successive Transaction = -0.06
The formula for Covariance of Successive Transaction is:
= - [(Square of Spread)/2]
0.06 = Square of spread / 2
Square of spread = 0.12
Spread = Square root of 0.12
Spread = 0.35
Estimate of Bid – Ask Spread (Measured in percentage of the average price of $50):
= Spread / Average Price
= 0.35 / 50
= 0.

1. One stock has traded at an average price of $50 over the course of a trading day. The covariance of successive transaction price changes is about XXXXXXXXXXUsing the Roll model, what is the...

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