PLANO, Texas, Oct. 14, 2025 (SEND2PRESS NEWSWIRE) -- Optimal Blue today released its September 2025 Market Advantage mortgage data report, which showed a sharp increase in rate-lock activity as mortgage rates fell throughout the month to their lowest levels in nearly a year. Total lock volume rose 28% month over month (MoM), led by a surge in refinance lending as borrowers seized on the opportunity to lower monthly payments. Purchases also climbed 6% MoM, outperforming typical seasonal trends as improved affordability brought more buyers into the market.