金属新材料板块12月22日涨0.2%，龙磁科技领涨，主力资金净流出4.5亿元

Group 1 - The metal new materials sector increased by 0.2% compared to the previous trading day, with Longmag Technology leading the gains [1] - On the same day, the Shanghai Composite Index closed at 3917.36, up by 0.69%, while the Shenzhen Component Index closed at 13332.73, up by 1.47% [1] Group 2 - In terms of capital flow, the metal new materials sector experienced a net outflow of 450 million yuan from main funds, while retail investors contributed a net inflow of 519 million yuan [2] - Speculative funds saw a net outflow of approximately 6.88 million yuan [2]