Assuming 30 trading days horizon, Comcast Corporation is expected to generate 1.12 times more return on investment than Directv. However, Comcast is 1.12 times more volatile than DIRECTV. It trades about -0.1 of its potential returns per unit of risk. DIRECTV is currently generating about -0.15 per unit of risk. If you would invest 3,024 in Comcast Corporation on April 25, 2012 and sell it today you would lose (131.00) from holding Comcast Corporation or give up 4.33% of portfolio value over 30 days.
Diversification
Poor diversification
Overlapping area represents amount of risk that can be diversified away by holding Comcast Corp. and DIRECTV in the same portfolio (assuming nothing else is changed)
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