Given investment horizon of 30 days, NYSE is expected to under-perform the PNC Financia. But the index apears to be less risky and, when comparing its historical volatility, NYSE is 1.42 times less risky than PNC Financia. The index trades about -0.32 of its potential returns per unit of risk. The PNC Financial Services Group Inc. is currently generating about -0.22 of returns per unit of risk over similar time horizon. If you would invest 6,626 in PNC Financial Services Group Inc. on April 24, 2012 and sell it today you would lose (435.00) from holding PNC Financial Services Group Inc. or give up 6.57% of portfolio value over 30 days.
Diversification
Very poor diversification
Overlapping area represents amount of risk that can be diversified away by holding NYSE and PNC Financial Services Group I in the same portfolio (assuming nothing else is changed)