Core Insights - The A-share market has undergone significant transformation over the past decade, with substantial growth in market size, trading activity, and investor structure [2][4]. Market Size Expansion - The total market capitalization of A-shares increased from approximately 62.75 trillion yuan in 2015 to 107.19 trillion yuan in 2025, marking a growth of over 70% and surpassing the one hundred trillion yuan milestone [5][6]. - The number of listed companies rose from 2,808 in 2015 to 5,167 in 2025, an increase of over 84%, with many new listings coming from emerging sectors such as technology, renewable energy, and pharmaceuticals [5][6]. Trading Activity Increase - As of October 9, 2025, the total trading volume reached 307 trillion yuan, exceeding the entire trading volume of 253 trillion yuan in 2015, reflecting a 121% increase [6][8]. - The average daily trading volume in 2025 was 16.6 billion yuan, a 60% increase from 10.4 billion yuan in 2015, indicating heightened market participation [6][7]. Investor Base Growth - The number of A-share investors grew from 99.11 million at the end of 2015 to over 240 million by 2025, representing a growth of over 140% [9][10]. - The investor structure has shifted from a predominance of retail investors to a more balanced mix, with institutional investors gaining a stronger foothold in the market [11][12]. Leverage Level Rationalization - The leverage level in the A-share market has stabilized, with the margin financing balance increasing from 1.17 trillion yuan in 2015 to 2.39 trillion yuan in 2025, while the proportion of margin financing to total market capitalization decreased from 4.27% to 2.49% [12][13]. Sectoral Restructuring - The market has transitioned from being dominated by traditional sectors like finance and energy to a focus on technology and emerging industries. The information technology sector's market capitalization grew from 5.55 trillion yuan in 2015 to 24.04 trillion yuan in 2025, increasing its market share from 9.97% to 19.76% [15][16]. - The financial sector's market share decreased from 22.98% in 2015 to 18.29% in 2025, while the real estate sector's share fell from 4.32% to 1.07% [15][16].