节前观望情绪浓厚，个股涨跌分化

Group 1 - The three major indices opened lower, with the Shanghai Composite Index down 0.1%, the Shenzhen Component Index down 0.17%, and the ChiNext Index down 0.24%, followed by narrow fluctuations and a significant decrease in trading volume compared to the previous day [1] - In terms of real estate, January's second-hand housing transaction volume remained flat month-on-month and the year-on-year decline narrowed, with a 3% month-on-month decrease in the transaction volume index for 80 cities and a 3% year-on-year decrease [1] - The transaction price index for second-hand residential properties saw a significant narrowing of the month-on-month decline to -0.6%, indicating a potential investment opportunity in the real estate and property management sectors [1] Group 2 - The optical fiber sector is experiencing a strong growth cycle driven by AI computing infrastructure and domestic communication policies, leading to simultaneous increases in both price and demand [2] - The Ministry of Industry and Information Technology is promoting the construction of high-speed optical fibers and ultra-low loss fibers, which supports the domestic optical communication industry's upgrade and opens long-term growth potential [2] - The current optical fiber sector benefits from four major advantages: policy support, explosive demand, improved supply-demand dynamics, and technological upgrades, making it a core focus in the optical communication field [2]