奥士康股价连续3天下跌累计跌幅6.87%，大成基金旗下1只基金持2.5万股，浮亏损失7.77万元

Group 1 - The core point of the news is that Aoshikang's stock price has been declining for three consecutive days, with a total drop of 6.87% during this period, currently trading at 42.13 yuan per share and a market capitalization of 13.37 billion yuan [1] - Aoshikang Technology Co., Ltd. is based in Shenzhen, Guangdong, and specializes in the research, production, and sales of high-density printed circuit boards, with its main business revenue composition being 75.36% from four-layer and above boards, 16.24% from single/double-sided boards, and 8.40% from other sources [1] Group 2 - From the perspective of major fund holdings, Dachen Fund has a significant position in Aoshikang, with its Dachen Dynamic Quantitative Allocation Strategy Mixed A fund holding 25,000 shares, accounting for 1.11% of the fund's net value, ranking as the ninth largest holding [2] - The Dachen Dynamic Quantitative Allocation Strategy Mixed A fund has a total scale of 42.3969 million yuan, with a year-to-date return of 10.31% and a one-year return of 69.66%, ranking 1688 out of 8861 and 664 out of 8126 respectively [2] - The fund manager, Xia Gao, has been in position for 11 years and 56 days, with the best fund return during his tenure being 260.52% and the worst being -71.74% [2]