Considering 30-days investment horizon, Total SA is expected to generate 0.95 times more return on investment than Eni SPA. However, Total SA is 1.05 times less risky than Eni SPA. It trades about -0.33 of its potential returns per unit of risk. Eni SpA is currently generating about -0.37 per unit of risk. If you would invest 4,837 in Total SA on April 26, 2012 and sell it today you would lose (448.00) from holding Total SA or give up 9.26% of portfolio value over 30 days.
Diversification
Very weak diversification
Overlapping area represents amount of risk that can be diversified away by holding Total SA and Eni SpA in the same portfolio (assuming nothing else is changed)