Considering 30-days investment horizon, Merck & Inc. is expected to under-perform the Yahoo. But the stock apears to be less risky and, when comparing its historical volatility, Merck & Inc. is 1.73 times less risky than Yahoo. The stock trades about -0.13 of its potential returns per unit of risk. The Yahoo! Inc. is currently generating about -0.03 of returns per unit of risk over similar time horizon. If you would invest 1,557 in Yahoo! Inc. on April 26, 2012 and sell it today you would lose (21.00) from holding Yahoo! Inc. or give up 1.35% of portfolio value over 30 days.
Diversification
Average diversification
Overlapping area represents amount of risk that can be diversified away by holding Merck & Co. Inc. and Yahoo! Inc. in the same portfolio (assuming nothing else is changed)
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