Group 1 - The cultivated diamond concept declined by 2.94%, ranking among the top declines in the concept sector as of the market close on October 23 [1] - Within the cultivated diamond sector, companies such as Strength Diamond, Sifangda, and Chaohongji experienced significant declines, while a few companies like Guoli Electronics, World, and Yuyuan Co. saw increases of 3.52%, 1.49%, and 0.69% respectively [1][2] - The cultivated diamond sector experienced a net outflow of 1.155 billion yuan in principal funds today, with 12 stocks seeing net outflows, and 7 stocks having outflows exceeding 50 million yuan [2] Group 2 - The top net outflow stock was Huanghe Xuanfeng, with a net outflow of 518 million yuan, followed by Chuangjiang New Materials, Jingsheng Mechanical and Electrical, and Sifangda with net outflows of 202 million yuan, 108 million yuan, and 88.7 million yuan respectively [2] - The stocks with the highest net inflows included World, *ST Yazhen, and Inno Laser, with net inflows of 25.5 million yuan, 15.9 million yuan, and 7.4 million yuan respectively [2][3] - The cultivated diamond concept sector had several stocks with notable declines, including Strength Diamond at -7.97%, Sifangda at -7.05%, and Chao Hong Ji at -6.32% [2][3]