At the top. Last year, Ana Botín ranked No. 15 on Fortune’s annual ranking of the world's Most Powerful Women in Business. The Banco Santander executive chair is the fourth member of her family ...

Santander, Spain's biggest bank was lowered to A+ from AA-, and BBVA was reduced to A from A+, S&P said on Monday in a statement. Both have a negative outlook, the ratings firm said.