Given investment horizon of 30 days, HeritageCrystal Clean Inc is expected to under-perform the Curis. But the stock apears to be less risky and, when comparing its historical volatility, HeritageCrystal Clean Inc is 1.03 times less risky than Curis. The stock trades about -0.22 of its potential returns per unit of risk. The Curis Inc. is currently generating about -0.08 of returns per unit of risk over similar time horizon. If you would invest 498.00 in Curis Inc. on April 26, 2012 and sell it today you would lose (38.00) from holding Curis Inc. or give up 7.63% of portfolio value over 30 days.
Diversification
Modest diversification
Overlapping area represents amount of risk that can be diversified away by holding HeritageCrystal Clean Inc and Curis Inc. in the same portfolio (assuming nothing else is changed)