      Regardless of whether you are considering a stock, sector, broadaverage, future, bond, commodity, or currency, all securities react todifferent types of information. As an example, let's use a war in theMiddle East that may cause oil prices to rise. In the Oil sector, Mobil,Texaco, and the other oil stocks will almost always increase in price overtime. The reason for this is oil companies have vast reserves of oil. Thecost to drill, pump, and refine oil into usable product is generally fixed.Therefore, higher oil prices fatten the bottom line of these companies inthe short term, and thus drive up the prices of these stocks.