"We wanted to take the time to have those discussions to pick the best choice of action, and this was an option which -- we got very clear views from our shareholders -- was seen as the best option," Mathers said in a newswires call.

Mathers added this latest 4 billion Swiss franc (£3.14 billion) cash call, which follows fundraising of around 6 billion francs in late 2015, would take the question of Credit Suisse's capital solidity off the table.

(Reporting by Joshua Franklin and John Miller; editing by Michael Shields)