Ecopetrol S.A. Announces Results for the First Quarter of 2011

-- Net income of Ecopetrol S.A. reached COL$3.4 trillion, equivalent to COL$84.12 per share. BOGOTA, Colombia, May 4, 2011 /PRNewswire via COMTEX/ -- Ecopetrol S.A. (bvc:ECOPETROL) /quotes/comstock/13*!ec/quotes/nls/ec EC +0.63% (bvl:EC)...