Sou Hu Cai Jing·2025-10-31 10:51Core Insights - The Biotech Index (970038) closed at 2279.35 points, up 0.77%, with a trading volume of 28.709 billion yuan and a turnover rate of 1.85% [1] - Among the index constituents, 41 stocks rose, with Hualan Vaccine leading at a 17.88% increase, while 8 stocks fell, with Deep Technology leading the decline at 6.38% [1] Index Performance - The Biotech Index saw a net inflow of 140 million yuan from institutional investors, while retail investors contributed a net inflow of 210 million yuan, and there was a net outflow of 350 million yuan from speculative funds [1] Top Constituents - The top ten constituents of the Biotech Index include: - Mindray Medical (sz300760) with a weight of 13.81%, latest price at 215.04, and a decrease of 0.76% [1] - Changchun High-tech (sz000661) with a weight of 5.41%, latest price at 112.26, and a decrease of 2.55% [1] - Kanglong Chemical (sz300759) with a weight of 4.66%, latest price at 33.51, and an increase of 1.12% [1] - Other notable constituents include Muyuans (sz002714) and Aimeike (sz300896) with respective weights of 3.66% and 3.44% [1] Capital Flow Details - Detailed capital flow for key stocks includes: - Mindray Medical saw a net inflow of 26.2 million yuan from institutional investors [2] - Muyuans had a net inflow of 203 million yuan from institutional investors [2] - Hualan Vaccine experienced a net inflow of 74.8 million yuan from institutional investors [2]