半导体板块8月18日涨2.87%，屹唐股份领涨，主力资金净流入7.05亿元

Group 1 - The semiconductor sector experienced a significant increase of 2.87% on August 18, with Yitang Co. 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] - Notable gainers in the semiconductor sector included Yitang Co. with a closing price of 27.90, up 18.27%, and Juguang Technology with a closing price of 114.58, up 15.10% [1] Group 2 - The semiconductor sector saw a net inflow of 705 million yuan from institutional investors, while retail investors contributed a net inflow of 467 million yuan [2] - The top stocks by net inflow from institutional investors included Haowei Group with 45.216 million yuan and Xindong Technology with 22 million yuan [3] - Conversely, retail investors showed a net outflow in several stocks, including Yitang Co. with a net outflow of 80.3092 million yuan [3]