Analysts say the second phase of building China's strategic petroleum reserve will begin in the first half of 2011. This addition is expected to be for 168 million barrels, adding to the 100 million barrels in the reserve. China International Capital Corporation, a Beijing investment bank, says this stocking up and the rising inventories at Chinese oil companies could increase oil prices by $6.50 a barrel in 2011 and 2012. Existing Chinese reserves cover only 12 days of demand, compared to the 103 million barrels or 40 days for the US strategic petroleum reserve. This increases the uncertainty in world oil markets. A daily addition of 150,000 barrels a day would meet one third of the expected second phase in 2011, and this amounts to about 10% of the International Energy Agency's forecast increase in global demand for 2011. At the same time if oil gets too expensive, China could decide to wait for a more opportune time to build stocks.