Zheng Xing Xing Ye Ri Bao·2025-09-18 08:59Market Overview - On September 18, the advertising and marketing sector declined by 3.12%, with Qitian Technology leading the drop [1] - The Shanghai Composite Index closed at 3831.66, down 1.15%, while the Shenzhen Component Index closed at 13075.66, down 1.06% [1] Stock Performance - Notable gainers included: - Diansheng Co., Ltd. (300805) with a closing price of 13.50, up 3.29% [1] - Yuanlong Yatu (002878) with a closing price of 20.43, up 0.84% [1] - Significant decliners included: - Qitian Technology (300061) with a closing price of 12.91, down 5.56% [2] - Zitian Tui (300280) with a closing price of 0.53, down 5.36% [2] Trading Volume and Capital Flow - The advertising and marketing sector experienced a net outflow of 1.157 billion yuan from institutional investors, while retail investors saw a net inflow of 922 million yuan [2] - The trading volume for key stocks included: - Diansheng Co., Ltd. with a trading volume of 304,500 shares and a transaction value of 403 million yuan [1] - Yuanlong Yatu with a trading volume of 244,700 shares and a transaction value of 494 million yuan [1] Capital Inflow Analysis - Key stocks with significant capital inflow included: - Diansheng Co., Ltd. with a net inflow of 24.67 million yuan from institutional investors [3] - Yuanlong Yatu with a net inflow of 11.64 million yuan from institutional investors [3] - Notable outflows were observed in: - Qitian Technology with a net outflow of 1.27 million yuan from institutional investors [3] - Simai Media (002712) with a net outflow of 6.68 million yuan from institutional investors [3]