广告营销板块1月21日跌0.1%，易点天下领跌，主力资金净流出7.22亿元

Group 1: Market Overview - The advertising marketing sector experienced a slight decline of 0.1% on January 21, with 易点天下 leading the drop [1] - The Shanghai Composite Index closed at 4116.94, up 0.08%, while the Shenzhen Component Index closed at 14255.12, up 0.7% [1] Group 2: Stock Performance - 天地在线 saw a significant increase of 10.01%, closing at 21.66, with a trading volume of 248,300 shares and a transaction value of 526 million [1] - 蓝色光标 increased by 4.84%, closing at 18.64, with a trading volume of 6,606,900 shares and a transaction value of 12.007 billion [1] - 易点天下 experienced a notable decline of 8.41%, closing at 59.59, with a trading volume of 1,181,600 shares and a transaction value of 687.7 million [2] Group 3: Capital Flow - The advertising marketing sector saw a net outflow of 722 million from institutional investors, while retail investors had a net inflow of 411 million [2] - The capital flow data indicates that 易点天下 had a net outflow of 356 million from retail investors, despite a net inflow of 12.8 million from institutional investors [3]