港股券商股集体下挫，机构指券商板块估值处于历史低位

Group 1 - The core viewpoint of the news indicates a collective decline in Hong Kong brokerage stocks, with major firms like CITIC Securities dropping over 4% and others like China Galaxy, CICC, CITIC Construction Investment, and China Merchants Securities falling more than 3% [1] Group 2 - Galaxy Securities states that the national policy goals of "stabilizing growth, stabilizing the stock market," and "boosting the capital market" will continue to define the future direction of the sector [3] - Factors such as a moderately loose liquidity environment, continuous optimization of the capital market, and the rebuilding of investor confidence are collectively driving the improvement in the brokerage sector's prosperity [3] - The valuation of the brokerage sector is currently at a historical low, suggesting a defensive rebound with both offensive and defensive characteristics [3]