LIMA, Aug 9 (Reuters) - Peruvian central bank President Julio Velarde has agreed to stay on for an extra term, a source familiar with his decision said on Monday, which should calm markets that have been rattled by the election of a new left-wing president.

The source declined to be identified because the decision has not been made public yet. Newly inaugurated President Pedro Castillo had asked Velarde to stay in the role. (Reporting by Marco Aquino; Editing by Christian Schmollinger)