Given investment horizon of 30 days, Spartan Motors Inc. is expected to generate 2.45 times more return on investment than Ford. However, Spartan is 2.45 times more volatile than Ford Motor. It trades about -0.07 of its potential returns per unit of risk. Ford Motor is currently generating about -0.36 per unit of risk. If you would invest 448.00 in Spartan Motors Inc. on April 26, 2012 and sell it today you would lose (28.00) from holding Spartan Motors Inc. or give up 6.25% of portfolio value over 30 days.
Diversification
Modest diversification
Overlapping area represents amount of risk that can be diversified away by holding Spartan Motors Inc. and Ford Motor Co. in the same portfolio (assuming nothing else is changed)