Assuming 30 trading days horizon, 3396C.PA is expected to under-perform the 4629CPA. In addition to that, 3396CPA is 1.39 times more volatile than 4629C.PA. It trades about -0.6 of its total potential returns per unit of risk. 4629C.PA is currently generating about -0.43 per unit of volatility. If you would invest 41.00 in 4629C.PA on April 24, 2012 and sell it today you would lose (29.00) from holding 4629C.PA or give up 70.73% of portfolio value over 30 days.
Diversification
Very good diversification
Overlapping area represents amount of risk that can be diversified away by holding 3396C.PA and 4629C.PA in the same portfolio (assuming nothing else is changed)