轨交设备板块1月20日涨0.77%，工大高科领涨，主力资金净流出1.07亿元

Group 1 - The rail transit equipment sector increased by 0.77% compared to the previous trading day, with Gongda Gaoke leading the gains [1] - The Shanghai Composite Index closed at 4113.65, down 0.01%, while the Shenzhen Component Index closed at 14155.63, down 0.97% [1] - Gongda Gaoke's closing price was 33.30, reflecting a rise of 5.05%, with a trading volume of 52,200 shares and a transaction value of 174 million yuan [1] Group 2 - The rail transit equipment sector experienced a net outflow of 107 million yuan from institutional investors, while retail investors saw a net inflow of 169 million yuan [2][3] - Major stocks in the sector showed varied performance, with China CRRC experiencing a net inflow of 116 million yuan from institutional investors, but a net outflow from retail investors [3] - The trading volume and transaction values for various stocks in the sector indicate active trading, with notable figures such as 1.16 billion yuan for China CRRC and 762,050 yuan for Jiao Da Tie Fa [3]