Source: Yahoo Finance, Hydrocarbons Colombia
Colombian oil stocks started to creep up on Friday afternoon then shot up at the end of trading. Most stocks jumped when the market opened on Monday and then drifted around after the C&C Energy/Pacific Rubiales announcement to finish as seen in the chart. Only one stock finished lower (Petrodorado) and one stock (Suroco) had its run up entirely on Friday afternoon and opened lower on Monday rather than higher.