光学光电子板块8月20日涨3.14%，森霸传感领涨，主力资金净流入27.96亿元

Group 1 - The optical optoelectronics sector increased by 3.14% on August 20, with Senba Sensor leading the gains [1] - The Shanghai Composite Index closed at 3766.21, up 1.04%, while the Shenzhen Component Index closed at 11926.74, up 0.89% [1] - A table detailing the individual stock performance within the optical optoelectronics sector was provided [1] Group 2 - The net inflow of main funds into the optical optoelectronics sector was 2.796 billion yuan, while retail funds experienced a net outflow of 2.003 billion yuan [2] - The net outflow of speculative funds was 792 million yuan [2] - A table showing the fund flow for individual stocks in the optical optoelectronics sector was included [2]