Group 1 - Treasury yields are rising, reversing last week's declines, influenced by an increase in Japanese government bond yields following the Bank of Japan's interest rate hike [1] - Traders are anticipating the delayed first-estimate U.S. third-quarter GDP data, which is set to be released at 8:30 a.m. Eastern time on Tuesday [1] - Any weakness in the GDP data could enhance the prospects for U.S. interest rate cuts, potentially leading to lower Treasury yields, especially after recent inflation figures fell below forecasts [1] Group 2 - The Conference Board's December consumer confidence index will be released at 10 a.m. Eastern time and is expected to be closely monitored [2] - Trading activity may slow down following the consumer confidence index release due to the holiday-shortened trading week [2]