Banco Bilbao Vizcaya Argentaria, S.A., better known by its initialism BBVA, is a multinational Spanish banking group. It was formed from a merger of Banco Bilbao Vizcaya and Argentaria in 1999, and is the second largest bank in Spain. The company is a constituent of the IBEX 35 and Euro Stoxx 50 stock market index. In 2007, the firm started an initiative to digitally transform the bank. Following implementation, it saw a 19% year-on-year increase in new customers. As of 2015, the total number of these clients stood at 14.8 million.