Ecuador’s rules prohibiting banks from charging customers for some credit card services may reduce revenue, Fitch Ratings said.

“Ecuadorian banks will be challenged to diversify income and maintain improvements in profitability achieved in 2011 over the long term,” the ratings company said today in a statement.

To contact the reporter on this story: Nathan Gill in Quito at ngill4@bloomberg.net

To contact the editor responsible for this story: David Papadopoulos at papadopoulos@bloomberg.net