证券时报·2025-05-20 09:48Market Overview - A-shares experienced a broad rally on May 20, with the Shanghai Composite Index closing up 0.38% at 3380.48 points, the Shenzhen Component up 0.77% at 10249.17 points, and the ChiNext Index up 0.77% at 2048.46 points. The total trading volume across the three exchanges reached 121.14 billion yuan, an increase of 9.23 billion yuan from the previous day [1][2]. Pet Economy - The pet economy concept saw significant gains, with Tianyuan Pet (301335) hitting a 20% limit up and reaching a new high. Lusi Co. (832419) also hit a limit up, marking a new high. Other companies in this sector, such as Bei Yin Mei (002570) and Yi Yi Co. (001206), also experienced limit up [4][5][6]. - Analysts noted that the pet market has maintained high growth rates in recent years, benefiting from domestic brand replacement effects and improvements in product and brand strength. This has led to significant year-on-year sales growth and price increases for domestic brands [7]. Innovative Drug Sector - The innovative drug sector showed strong performance, with Yipin Hong (300723) and San Sheng Guo Jian (688336) both hitting the 20% limit up. Other companies like Rongchang Bio (688331) and Yifang Bio (688382) saw increases of approximately 16% [8][9]. - San Sheng Guo Jian announced a collaboration with Pfizer for the exclusive global development and commercialization rights of a dual-target antibody, SSGJ-707, which has shown promising results in clinical trials for non-small cell lung cancer [10][11]. Shipping Sector - The shipping sector experienced a significant pullback, with companies like Guo Hang Yuan Yang (833171) dropping nearly 18%, and others such as Fenghuang Shipping (000520) and Lianyungang (601008) hitting their daily limit down [16][17]. - Lianyungang, which had seen five consecutive limit up days, reported a 48.01% year-on-year decline in net profit for the first quarter of 2025, raising concerns among investors [18][19].