Core Insights - The advertising and marketing sector saw a rise of 0.46% on October 21, with Inry Media leading the gains [1] - The Shanghai Composite Index closed at 3916.33, up 1.36%, while the Shenzhen Component Index closed at 13077.32, up 2.06% [1] Group 1: Stock Performance - Inry Media (603598) closed at 16.59, with a gain of 4.54% and a trading volume of 126,300 shares, amounting to a transaction value of 209 million yuan [1] - Other notable performers included: - Electric Sound Co. (300805) at 11.29, up 3.01% [1] - Yaowang Technology (002291) at 6.95, up 2.51% [1] - Simay Media (002712) at 5.45, up 2.44% [1] - Shenguang Group (002400) at 7.95, up 2.19% [1] Group 2: Capital Flow - The advertising and marketing sector experienced a net inflow of 86.88 million yuan from institutional investors, while retail investors saw a net outflow of 21.03 million yuan [2] - The main stocks with significant capital flow included: - Flag Technology (300061) with a net outflow of 15.2 million yuan [2] - Fenjun Media (002027) with a net outflow of 72.8 million yuan [2] - Tianxia Show (600556) with a net outflow of 59.5 million yuan [2]