A simple index of three stocks have opening values on day 1 and day 8 as shown in the table below. Day 1 No, shares Price per share Stock ABC 8000 $4.25 Stock XYZ 5000 $3.90 Stock QRS 2000 $6.40
Day 8 No, shares Price per share Stock ABC 8000 $3.90 Stock XYZ 5000 $ 2.50 Stock QRS 2000 $6.10
What is the rate of change of this simple index over one week?
