Oil markets are full of uncertainty. Asian demand is booming and doubts abound over the ability of supply to match the world's appetite. What goes for crude oil also applies to the stuff squeezed out of vegetable matter. The price of frying food and cooking has rarely been higher. Over past decade the price of vegetable oils has increased substantially. Like other commodities, prices hit records in 2008. The subsequent slump is now forgotten: prices are back close to the peaks. Increasing demand and supply problems indicate that prices will not go down in the near future