德业股份股价跌5.03%，国泰基金旗下1只基金重仓，持有17.4万股浮亏损失82.66万元

Group 1 - The core point of the news is that Deye Technology Co., Ltd. experienced a stock decline of 5.03% on January 28, with a share price of 89.60 yuan and a total market capitalization of 81.436 billion yuan [1] - Deye's main business includes the research, production, and sales of evaporators, condensers, variable frequency control chips, dehumidifiers, and air source heat pump hot air machines, with revenue composition as follows: inverters 47.77%, energy storage battery packs 25.69%, heat exchangers 15.68%, dehumidifiers 7.36%, and others 3.16% [1] - The company is located in Ningbo, Zhejiang Province, and was established on August 4, 2000, with its listing date on April 20, 2021 [1] Group 2 - From the perspective of fund holdings, only one fund from Guotai Fund has a significant position in Deye, specifically the Guotai CSI Photovoltaic Industry ETF, which reduced its holdings by 25,200 shares in the fourth quarter, holding a total of 174,000 shares, accounting for 2.72% of the fund's net value [2] - The Guotai CSI Photovoltaic Industry ETF was established on July 28, 2021, with a current scale of 551 million yuan, and has achieved a return of 17.31% this year, ranking 343 out of 5,549 in its category [2] - The fund manager of the Guotai CSI Photovoltaic Industry ETF is Huang Yue, who has been in the position for nearly 5 years, with the fund's total asset scale at 49.496 billion yuan and a best return of 47.87% during his tenure [3]