润欣科技股价跌5.03%，南方基金旗下1只基金位居十大流通股东，持有393.01万股浮亏损失499.12万元

Group 1 - The core viewpoint of the news is that Runxin Technology's stock has experienced a decline of 5.03%, with a current price of 23.98 CNY per share and a total market capitalization of 12.292 billion CNY [1] - Runxin Technology, established on October 9, 2000, and listed on December 10, 2015, specializes in providing IC application solutions and technical support services, with 100% of its revenue derived from IC and other electronic components [1] Group 2 - Among the top circulating shareholders of Runxin Technology, the Southern Fund's Southern CSI 1000 ETF (512100) has recently entered the top ten, holding 3.9301 million shares, which accounts for 0.78% of the circulating shares [2] - The Southern CSI 1000 ETF (512100) has a total scale of 64.953 billion CNY and has achieved a year-to-date return of 26.28%, ranking 1562 out of 4222 in its category [2] - The fund manager of Southern CSI 1000 ETF is Cui Lei, who has been in the position for 6 years and 297 days, with the best fund return during the tenure being 127.15% [3]