Provided by Dow Jones By Xavier Fontdegloria Banco Bilbao Vizcaya Argentaria SA said Friday that it will start a share buyback program of up to 10% of its capital in the fourth quarter after registering better-than-expected profits from April to June. The Spanish bank's net profit grew 10% compared with the same period last year to 701 million euros ($833.4 million). Analysts expected the lender to post a profit of EUR379 million. BBVA said net interest income--the difference between what lenders earn from loans and pay for deposits, a key profit driver for retail banks--was EUR3.50 billion compared with EUR3.54 billion a year earlier.