Ecopetrol is suffering from deteriorating corporate governance while the petroleum giant is led by Colombian President Gustavo Petro's political campaign manager.
While the fall was slightly better than expected, the positive difference is likely not enough to radicalize the central bank into taking more drastic measures.
Alejandro Arango has resigned, Pedro Manrique Gutiérrez has retired, and Fernán Ignacio Bejarano's service is coming to an end for undisclosed reasons.
Frontera board chair Gabriel de Alba called the discovery another positive development for the company's "potentially transformational investments in Guyana."