4. EDENOR ( EDN) is the largest electricity distribution company in Argentina, in terms of number of customers and electricity sold. Edenor distributes electricity exclusively to the northwestern zone of the greater Buenos Aires metropolitan area and to the northern part of the city of Buenos Aires, which has 7 million population and an area of 4,637 sq. km. Net sales were up 8.3% year-over-year during 2010 third quarter mainly because of higher volume of energy and capacity sold. Volume of energy sold increased 6% in the third quarter of 2010 due to higher consumption per customer. Gross margin rose during the quarter on higher volume of energy and capacity sold. The stock delivered 55% gains during the last one year, and has 27% upside potential in the next one year, as per analysts' consensus estimates.