今日涨跌停股分析：65只涨停股、24只跌停股，商业航天概念走强，航天机电12天7板

Group 1 - On December 15, the A-share market saw a total of 65 stocks hitting the daily limit up and 24 stocks hitting the daily limit down [1] - The dairy and milk powder sector was active, with companies like Junyao Health and Sunshine Dairy reaching the limit up [1] - The commercial aerospace sector strengthened, with Aerospace Machinery achieving 7 limit ups in 12 days, and companies like Aerospace Information and Leike Defense also hitting the limit up [1] Group 2 - Among the continuous limit up stocks, *ST Chengchang achieved 6 limit ups in 7 days, while Zengsheng Technology had 6 consecutive limit ups [1] - Other notable stocks include Furi Shares with 3 limit ups in 7 days, and Meikailong with 3 limit ups in 5 days [1] - Conversely, *ST Zhengping faced 9 consecutive limit downs, and *ST Fanli had 8 consecutive limit downs, indicating significant downward pressure on these stocks [1]