Considering 30-days investment horizon, Novartis AG is expected to generate 0.46 times more return on investment than SanofiAventis. However, Novartis AG is 2.16 times less risky than SanofiAventis. It trades about -0.43 of its potential returns per unit of risk. SanofiAventis is currently generating about -0.31 per unit of risk. If you would invest 5,502 in Novartis AG on April 26, 2012 and sell it today you would lose (306.00) from holding Novartis AG or give up 5.56% of portfolio value over 30 days.
Diversification
Modest diversification
Overlapping area represents amount of risk that can be diversified away by holding Novartis AG and SanofiAventis in the same portfolio (assuming nothing else is changed)