Considering 30-days investment horizon, Honda Motor Ltd. is expected to generate 0.5 times more return on investment than Tata. However, Honda Motor Ltd. is 2.01 times less risky than Tata. It trades about -0.45 of its potential returns per unit of risk. Tata Motors Ltd. is currently generating about -0.41 per unit of risk. If you would invest 3,653 in Honda Motor Ltd. on April 26, 2012 and sell it today you would lose (461.00) from holding Honda Motor Ltd. or give up 12.62% of portfolio value over 30 days.
Diversification
Weak diversification
Overlapping area represents amount of risk that can be diversified away by holding Honda Motor Co. Ltd. and Tata Motors Ltd. in the same portfolio (assuming nothing else is changed)