特钢板块12月19日涨2.03%，甬金股份领涨，主力资金净流入6571.43万元

Group 1 - The special steel sector increased by 2.03% compared to the previous trading day, with Yongjin Co., Ltd. leading the gains [1] - The Shanghai Composite Index closed at 3890.45, up 0.36%, while the Shenzhen Component Index closed at 13140.22, up 0.66% [1] Group 2 - The net inflow of main funds in the special steel sector was 65.7143 million yuan, while retail funds experienced a net outflow of 46.2731 million yuan [2] - Speculative funds saw a net outflow of 19.4412 million yuan [2]