A股，节后开盘突然大涨51点，原因是什么？

Core Viewpoint - The A-share market experienced a significant rise, with the Shanghai Composite Index reaching a ten-year high of 3936 points, indicating a breakout from a month-long consolidation phase [1][3]. Market Performance - The Shanghai Composite Index rose by over 51 points at its peak during the day, marking a notable upward trend [1]. - The ChiNext Index continued to reach new highs, reflecting strong market momentum [1]. Reasons for Market Movement - The breakthrough of the 3900-point level was anticipated before the holiday but was delayed due to selling pressure, which was alleviated post-holiday [3]. - The surge in the chip index, particularly driven by leading companies like SMIC and Cambrian, played a crucial role in lifting the market, with SMIC seeing a maximum increase of 9% and Cambrian 6% [3]. Future Market Outlook - Despite the initial strong performance, the chip index showed signs of retreat in the afternoon, with SMIC's gains reversing to a near 1% decline by the end of the day [4]. - The technology sector's decline was countered by resource stocks, particularly those represented by state-owned enterprises, which contributed positively to the index [4]. - There is an expectation of a potential style shift in the market as it enters the fourth quarter, with a focus on monitoring the pressures on the ChiNext and STAR Market [4].