炼化及贸易板块9月17日跌1.23%，岳阳兴长领跌，主力资金净流出4.42亿元

Market Overview - The refining and trading sector experienced a decline of 1.23% on September 17, with Yueyang Xingchang leading the drop [1] - The Shanghai Composite Index closed at 3876.34, up 0.37%, while the Shenzhen Component Index closed at 13215.46, up 1.16% [1] Stock Performance - Notable gainers in the refining and trading sector included: - Heshun Petroleum (603353) with a closing price of 16.84, up 2.18% [1] - Shenyang Chemical (000698) with a closing price of 4.35, up 1.16% [1] - Baoli International (300135) with a closing price of 4.47, up 1.13% [1] - Major decliners included: - Maoyang Xingchang (000819) with a closing price of 17.79, down 2.04% [2] - Compton (603798) with a closing price of 15.99, down 1.54% [2] - Bohai Chemical (600800) with a closing price of 3.94, down 1.50% [2] Capital Flow - The refining and trading sector saw a net outflow of 442 million yuan from institutional investors, while retail investors contributed a net inflow of 235 million yuan [2] - The overall capital flow for the sector indicated a mixed sentiment among different investor types [2] Individual Stock Capital Flow - Key stocks with significant capital flow included: - Dongfang Shenghong (000301) with a net inflow of 9.85 million yuan from institutional investors [3] - Heshun Petroleum (603353) with a net inflow of 1.38 million yuan from institutional investors [3] - Shenyang Chemical (000698) with a net inflow of 7.72 million yuan from institutional investors [3]