Banco Santander is trading 4.01% down at €11.83 on October 1, 2026, as European bank stocks led losses amid multi-year-high global bond yields. - The U.S. 10-year yield reached 5.3168%, intensifying concerns that interest rates could stay higher for longer. - No same-day company-specific catalyst was found; the 12.7-euro-cent interim dividend was announced September 29, not October 1, and does not directly explain the decline.