Considering 30-days investment horizon, Time Warner Inc. is expected to under-perform the Comcast. But the stock apears to be less risky and, when comparing its historical volatility, Time Warner Inc. is 1.22 times less risky than Comcast. The stock trades about -0.45 of its potential returns per unit of risk. The Comcast Corporation is currently generating about -0.2 of returns per unit of risk over similar time horizon. If you would invest 3,028 in Comcast Corporation on April 26, 2012 and sell it today you would lose (143.00) from holding Comcast Corporation or give up 4.72% of portfolio value over 30 days.
Diversification
Poor diversification
Overlapping area represents amount of risk that can be diversified away by holding Time Warner Inc. and Comcast Corp. in the same portfolio (assuming nothing else is changed)
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