Dow Jones Industrial Average plunged on Friday weighed down by US payrolls data, overseas weakening in manufacturing and slump in crude prices. Blue chip index erased all gains for 2012. It lost 2.22% or 274.88 points and closed at 12,118.57, 2.7% down for the week. All shares within the index ended lower. The main loser was Hewlett Packard that posted a drop of 6.3%. JP Morgan Chase fell 3.7%. The company has depreciated 23% this month after reporting a loss of more than USD 2 billion.