Considering 30-days investment horizon, JPMorgan Chase & is expected to under-perform the Merck. In addition to that, JPMorgan is 3.21 times more volatile than Merck & Inc.. It trades about -0.45 of its total potential returns per unit of risk. Merck & Inc. is currently generating about -0.13 per unit of volatility. If you would invest 3,846 in Merck & Inc. on April 26, 2012 and sell it today you would lose (91.00) from holding Merck & Inc. or give up 2.37% of portfolio value over 30 days.
Diversification
Average diversification
Overlapping area represents amount of risk that can be diversified away by holding JPMorgan Chase & Co. and Merck & Co. Inc. in the same portfolio (assuming nothing else is changed)