TTB says the baht opened at 33.58 per US dollar, close to Monday's 33.61 close, with support at 33.50 and resistance at 33.80 for the next 24 hours. Drivers are high US Treasury yields and this week's US CPI, PPI, retail sales and jobs data, with only a weak chance of a Fed rate hike this month. Foreign investors bought a net 266 million baht of Thai stocks but sold 420 million baht of Thai bonds on Monday. For importers and exporters, this is a narrow daily move; check your USD payment and receipt timing against the range rather than changing plans.