航海装备板块11月18日跌2.29%，国瑞科技领跌，主力资金净流出9.53亿元

Core Points - The marine equipment sector experienced a decline of 2.29% on November 18, with Guorui Technology leading the drop [1] - The Shanghai Composite Index closed at 3939.81, down 0.81%, while the Shenzhen Component Index closed at 13080.49, down 0.92% [1] Funding Flow - On the same day, the marine equipment sector saw a net outflow of 9.53 billion yuan from major funds, while retail investors contributed a net inflow of 8.15 billion yuan [2] - Speculative funds recorded a net inflow of 1.38 billion yuan into the marine equipment sector [2]