Assuming 30 trading days horizon, Lafarge S.A. is expected to under-perform the FLORIDA. In addition to that, Lafarge is 4.02 times more volatile than FLORIDA PWR 4.40 PFD. It trades about -0.29 of its total potential returns per unit of risk. FLORIDA PWR 4.40 PFD is currently generating about -0.2 per unit of volatility. If you would invest 9,600 in FLORIDA PWR 4.40 PFD on April 26, 2012 and sell it today you would lose (275.00) from holding FLORIDA PWR 4.40 PFD or give up 2.86% of portfolio value over 30 days.
Diversification
Good diversification
Overlapping area represents amount of risk that can be diversified away by holding Lafarge S.A. and FLORIDA PWR 4.40 PFD in the same portfolio (assuming nothing else is changed)