航运港口板块12月31日跌0.09%，厦门港务领跌，主力资金净流出1.78亿元

Core Viewpoint - The shipping and port sector experienced a slight decline of 0.09% on December 31, with Xiamen Port leading the losses, while the Shanghai Composite Index rose by 0.09% to close at 3968.84 [1]. Group 1: Market Performance - The shipping and port sector saw individual stock performances with notable declines, particularly Xiamen Port, which dropped by 5.70% to a closing price of 13.07 [2]. - Other stocks in the sector, such as Lianyungang and Bohai Ferry, showed positive movements with increases of 2.50% and 1.40%, respectively [1][2]. - The overall trading volume in the shipping and port sector was significant, with Lianyungang recording a transaction amount of 267 million yuan [1]. Group 2: Capital Flow - The shipping and port sector experienced a net outflow of 178 million yuan from institutional investors, while retail investors saw a net inflow of 248 million yuan [2]. - The data indicates that retail investors were more active in the market, contrasting with the outflows from institutional and speculative funds [2][3]. - Specific stocks like Qingdao Port and Yantian Port had varying levels of net inflow and outflow, reflecting differing investor sentiments [3].