冶钢原料板块1月21日涨4.38%，大中矿业领涨，主力资金净流入4.21亿元

Core Insights - The steel raw materials sector experienced a significant increase of 4.38% on January 21, with Dazhong Mining leading the gains [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] Sector Performance - Dazhong Mining (001203) saw a closing price of 30.66, with a rise of 10.01% and a trading volume of 329,400 shares, amounting to a transaction value of 983 million yuan [1] - Erdos (600295) closed at 15.67, up 4.82%, with a trading volume of 239,400 shares and a transaction value of 371 million yuan [1] - Jinding Mining (000655) increased by 2.79% to close at 10.30, with a trading volume of 162,100 shares and a transaction value of 165 million yuan [1] - Other notable performers include Baodi Mining (601121) and Guangdong Mingzhu (600382), both rising by 2.79% and 2.76% respectively [1] Capital Flow - The steel raw materials sector saw a net inflow of 421 million yuan from institutional investors, while retail investors experienced a net outflow of 368 million yuan [1] - Dazhong Mining had a net inflow of 2.38 billion yuan from institutional investors, but a net outflow of 1.90 billion yuan from retail investors [2] - Steel Titanium Co. (000629) recorded a net inflow of 80 million yuan from institutional investors, while retail investors had a net outflow of 1.07 billion yuan [2]