普钢板块12月31日跌0.06%，南钢股份领跌，主力资金净流入3726.36万元

Core Viewpoint - The steel sector experienced a slight decline, with the overall index showing mixed performance, highlighting the volatility in the market [1][2]. Group 1: Market Performance - On December 31, the steel sector fell by 0.06%, with Nanjing Steel leading the decline [1]. - The Shanghai Composite Index closed at 3968.84, up by 0.09%, while the Shenzhen Component Index closed at 13525.02, down by 0.58% [1]. Group 2: Individual Stock Performance - Baosteel shares closed at 7.45, up by 0.54%, with a trading volume of 543,700 shares and a transaction value of 406 million yuan [1]. - Nanjing Steel shares closed at 5.26, down by 2.23%, with a trading volume of 346,700 shares and a transaction value of 183 million yuan [2]. - The highest trading volume was recorded for Hebei Steel, with 877,500 shares traded, closing at 2.31, down by 0.86% [2]. Group 3: Capital Flow - The steel sector saw a net inflow of 37.26 million yuan from main funds, while retail funds experienced a net inflow of 8.99 million yuan [2]. - The main funds showed significant net inflow in Hualing Steel, amounting to 82.10 million yuan, while retail funds had a net outflow of 43.26 million yuan [3].