专业连锁板块8月18日涨2.13%，博士眼镜领涨，主力资金净流入1502.9万元

Market Performance - The professional chain sector increased by 2.13% on August 18, with Doctor Glasses leading the gains [1] - The Shanghai Composite Index closed at 3728.03, up 0.85%, while the Shenzhen Component Index closed at 11835.57, up 1.73% [1] Individual Stock Performance - Doctor Glasses (300622) closed at 36.71, up 4.23% with a trading volume of 249,000 shares and a transaction value of 901 million [1] - Other notable stocks include: - Yuan Shide (002416) closed at 12.69, up 2.67% [1] - Tianyin Holdings (000829) closed at 10.49, up 2.44% [1] - Huazhi Wine (300755) closed at 18.55, up 1.98% [1] - Kids Wang (301078) closed at 12.85, up 1.74% [1] - Aiyingshi (603214) closed at 19.38, up 0.83% [1] - Jifeng Technology (300022) closed at 8.55, down 0.70% [1] Capital Flow Analysis - The professional chain sector saw a net inflow of 15.03 million from institutional investors, while retail investors contributed a net inflow of 37.82 million [1] - Notable capital flows for individual stocks include: - Doctor Glasses had a net inflow of 24.96 million from institutional investors but a net outflow of 27.88 million from retail investors [2] - Yuan Shide experienced a net outflow of 33.88 million from retail investors [2] - Kids Wang had a significant net inflow of 36.20 million from retail investors despite a net outflow from institutional and speculative investors [2]