Considering 30-days investment horizon, PetroChina Ltd. is expected to under-perform the Chevron. In addition to that, PetroChina is 1.47 times more volatile than Chevron Corporation. It trades about -0.48 of its total potential returns per unit of risk. Chevron Corporation is currently generating about -0.32 per unit of volatility. If you would invest 10,620 in Chevron Corporation on April 26, 2012 and sell it today you would lose (734) from holding Chevron Corporation or give up 6.91% of portfolio value over 30 days.
Diversification
Very weak diversification
Overlapping area represents amount of risk that can be diversified away by holding PetroChina Co. Ltd. and Chevron Corp. in the same portfolio (assuming nothing else is changed)
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