Yduqs is trading at BRL 13.80, down 5.15% on October 13, 2026, with the reason for the decline unclear. - Available search results identify no new company-specific announcement or clearly stated catalyst. - The Afya merger agreement was announced on September 23, not October 13; available evidence does not establish it as the direct cause. - Supplied market context shows only modest declines in major U.S. indexes. No verified volume or trading-activity data was found.