Core Viewpoint - Shares of China's domestic legacy chipmakers surged following Beijing's announcement of an anti-dumping investigation into imported US semiconductors, marking a significant step in the country's efforts to develop domestic alternatives for analogue integrated-circuit chips [1][6]. Group 1: Market Reaction - SG Micro's shares surged by the maximum 20% limit, closing at 87.42 yuan (US$12.26) on Shenzhen's ChiNext board [2]. - 3Peak's shares rose by 9.7% to 163.2 yuan at closing, while Novosense Microelectronics gained 10.79% [4]. Group 2: Company Profiles - SG Micro has a diverse chip portfolio that includes industrial, consumer electronics, communications, and automotive applications, with power management chips being its largest product line. The company announced plans to seek a Hong Kong listing [3]. - 3Peak specializes in analogue signal chain and power management chips, contributing to its stock price increase [4]. Group 3: Industry Context - The anti-dumping investigation targets commodity interface ICs and gate driver ICs, both types of analogue chips produced on 40nm and larger nodes, following a complaint from the Jiangsu Semiconductor Industry Association [6]. - Analogue chips are essential for processing real-world signals and are widely used in various applications, including power management and automotive systems, typically manufactured using mature production nodes [5].