贸易板块9月12日涨0.61%，怡 亚 通领涨，主力资金净流入3199.03万元

Group 1 - The trade sector increased by 0.61% on September 12, with Yi Yatong leading the gains [1] - The Shanghai Composite Index closed at 3883.69, up 0.22%, while the Shenzhen Component Index closed at 12996.38, up 0.13% [1] - Key stocks in the trade sector showed varying performance, with Yi Yatong's closing price at 4.99, reflecting a 3.74% increase [1] Group 2 - The trade sector saw a net inflow of 31.99 million yuan from main funds, while retail investors experienced a net outflow of 26.06 million yuan [3] - The overall fund flow indicates a mixed sentiment, with speculative funds showing a net outflow of 0.59 million yuan [3]