A股午后一度“跳水”，发生了什么？

Market Overview - A-shares experienced a decline in the afternoon but rebounded around 2 PM, with the overall market showing mixed performance, where the Shanghai Composite Index outperformed the Shenzhen market [1] - The market sentiment is characterized by both optimism and caution, with micro-cap stocks showing signs of a bubble while large-cap stocks appear undervalued [1][12] - Despite the lack of systemic risks due to policy and liquidity support, there is a need to digest valuation pressures in the short term, and the current pullback can be seen as a buying opportunity [1][14] Index Performance - The Shanghai Composite Index slightly increased by 0.17% to 3615.72 points, while the ChiNext Index fell by 1.62% to 2367.68 points [3] - The trading volume showed a slight increase, with a total turnover of 1.87 trillion yuan, up from 1.83 trillion yuan the previous day [3] - A total of 3559 stocks declined, with 9 hitting the daily limit down, while 1713 stocks rose, with 55 hitting the daily limit up [3] Sector Performance - The steel sector rose by over 2%, with companies like Baogang Group and Xining Special Steel hitting the daily limit up [5][6] - The oil and petrochemical sector also saw gains of nearly 2%, while traditional cyclical sectors benefited from industry discipline and capacity optimization expectations [8][9] - Conversely, the electric equipment sector fell by over 2%, with CATL dropping more than 5% [7][8] Investment Strategy - Investors are advised to adopt a "defensive + buying on dips" strategy, avoiding high-flying stocks without earnings support and focusing on sectors with high earnings certainty [14][16] - The market is expected to maintain a volatile pattern in the coming weeks, with investors waiting for mid-year performance reports and policy details to be released [1][15] - There is a notable shift in funds from technology growth sectors to dividend-paying sectors, indicating a defensive investment approach [9][12] Future Outlook - The market is likely to continue its slow upward trend, with adjustments expected to be limited [9][14] - The core contradiction in the market is highlighted by the significant inflow of foreign capital, while domestic speculative sentiment appears to be retreating [12] - The focus for the second half of the year will revolve around the effects of "anti-involution" policies and global liquidity changes, with potential opportunities in growth stocks if the Federal Reserve begins to cut rates [16]