Gas prices here jumped from 78 cents a liter to 84 cents a liter overnight. When you look at the market, there's no noticeable event that would lead to an increase in the price of petroleum products. Gas prices were even on the downward trend at the height of the Iran nuclear threat. Some people say that this is pure trader manipulation. Lots of traders lost money in oil futures lately and they may have been successful in manipulating prices to go up.