.Daniel Pinto, JPMorgan's leader of business and investment financial institution. Simon Dawson|Bloomberg|Getty ImagesJPMorgan Chase portions fell 7% Tuesday after the financial institution's head of state told experts that assumptions for net interest earnings were actually too optimistic.The existing quote for NII-- one of the main ways that banks earn money-- of $89.5 billion is actually too high given assumptions for rate of interest, JPMorgan head of state Daniel Pinto told a viewers at a monetary conference.The figure "will definitely be actually reduced," he said.The move was the New York-based financial institution's worst drop due to the fact that June 2020, depending on to FactSet.This story is creating. Satisfy inspect back for updates.