Considering 30-days investment horizon, Herbalife Ltd. is expected to under-perform the Mannatech. In addition to that, Herbalife is 1.03 times more volatile than Mannatech Inc.. It trades about -0.28 of its total potential returns per unit of risk. Mannatech Inc. is currently generating about -0.13 per unit of volatility. If you would invest 418.00 in Mannatech Inc. on April 26, 2012 and sell it today you would lose (83.00) from holding Mannatech Inc. or give up 19.86% of portfolio value over 30 days.
Diversification
Good diversification
Overlapping area represents amount of risk that can be diversified away by holding Herbalife Ltd. and Mannatech Inc. in the same portfolio (assuming nothing else is changed)