广告营销板块12月15日跌1.05%，引力传媒领跌，主力资金净流出5.32亿元

Group 1 - The advertising and marketing sector experienced a decline of 1.05% on December 15, with Gravity Media leading the drop [1] - The Shanghai Composite Index closed at 3867.92, down 0.55%, while the Shenzhen Component Index closed at 13112.09, down 1.1% [1] - The individual stock performance within the advertising and marketing sector is detailed in a table [1] Group 2 - On the same day, the advertising and marketing sector saw a net outflow of 532 million yuan from major funds, while retail investors contributed a net inflow of 471 million yuan [2] - The net inflow from speculative funds was 60.18 million yuan [2] - A table detailing the fund flow for individual stocks in the advertising and marketing sector is provided [2]