Considering 30-days investment horizon, Honda Motor Ltd. is expected to under-perform the Spartan. But the stock apears to be less risky and, when comparing its historical volatility, Honda Motor Ltd. is 2.88 times less risky than Spartan. The stock trades about -0.45 of its potential returns per unit of risk. The Spartan Motors Inc. is currently generating about -0.07 of returns per unit of risk over similar time horizon. 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
Good diversification
Overlapping area represents amount of risk that can be diversified away by holding Honda Motor Co. Ltd. and Spartan Motors Inc. in the same portfolio (assuming nothing else is changed)