Group 1 - The core point of the article is that the CSI Medical Index (399989) closed at 6769.62 points on December 15, experiencing a decline of 0.96% with a trading volume of 16.41 billion yuan and a turnover rate of 1.13% [1] - Among the constituent stocks of the CSI Medical Index, 17 stocks rose, with Dabo Medical leading the gain at 4.68%, while 32 stocks fell, with Rejing Biotech leading the decline at 5.72% [1] - The net outflow of main funds from the CSI Medical Index constituent stocks totaled 587 million yuan, while retail investors saw a net inflow of 537 million yuan [2] Group 2 - The CSI Medical Index underwent adjustments in the last 10 days, adding 6 new stocks and removing 6 stocks from its constituents [2]