Zheng Quan Shi Bao Wang·2025-12-23 09:47Group 1 - The PET copper foil concept increased by 1.57%, ranking fourth among concept sectors, with 32 stocks rising, including Dongcai Technology which hit the daily limit, and others like Copper Crown Copper Foil, Defu Technology, and Nord Shares showing gains of 12.59%, 5.63%, and 4.30% respectively [1][2] - The PET copper foil sector saw a net inflow of 666 million yuan from main funds today, with 22 stocks receiving net inflows, and 7 stocks exceeding 50 million yuan in net inflow, led by Dongcai Technology with 228 million yuan [2][3] - The top three stocks by net inflow ratio were Nord Shares, Dongcai Technology, and Dadongnan, with ratios of 14.63%, 12.46%, and 11.41% respectively [3] Group 2 - The concept sectors with notable performance included lithography machines at 2.11% and fluorochemical concepts at 1.80%, while the worst performers included terahertz at -2.72% and military information technology at -2.54% [2] - The trading volume and turnover rates for key stocks in the PET copper foil sector were significant, with Dongcai Technology showing a turnover rate of 6.87% and Copper Crown Copper Foil at 9.97% [3][4] - Stocks like Defu Technology and Zhongyi Technology also performed well with gains of 5.63% and 3.73% respectively, indicating a positive trend in the sector [4]