Banco Santander is trading 5.49% down at €10.88, with no clearly confirmed company-specific announcement explaining the reported move on October 26. - Jefferies downgraded the stock to hold from buy ahead of results; that action was reported October 20 and does not establish the cause of this move. - The bank’s nine-month results are due October 28. - Reporting described pressure on European banks on October 22 amid bond-market concerns, higher oil and AI-related jitters; that prior session is context, not confirmation of the move’s catalyst.