Interactive Brokers is trading 4.22% down now at $85.05 as investors react to the Federal Reserve’s September 16, 2026 rate hike and guidance for another increase. - Higher rates, firm Treasury yields, and fading hopes for cuts are pressuring financial and rate-sensitive stocks. - Major U.S. indexes are also lower, indicating a broader risk-off move; Reuters reported the Fed raised rates and flagged further increases. - The positive September 15 X trading-integration announcement does not directly explain today’s decline; no new earnings, guidance change, or company-specific negative announcement was identified.