科技股领涨！A股全面普涨，中证2000指数ETF(159536)放量涨近2%，复盘5月，为何会出现大小盘两端强势的哑铃行情？

Core Viewpoint - The A-share market has shown a collective rebound with over 4,400 stocks rising, particularly in the technology sector and small-cap stocks, highlighted by the significant increase in the CSI 2000 Index ETF (159536) which surged by 1.86% on May 29 [1][3] Market Performance - The CSI 2000 Index ETF (159536) experienced a strong performance with a notable increase in trading volume, surpassing the total trading volume of the previous day [1] - Key stocks within the CSI 2000 Index saw a surge, with companies like Sifang Jingchuang and Tianyang Technology hitting the 20% daily limit up, while others like Qingdao Jinwang and Jinlong Automobile reached a 10% increase [3] - The CSI 2000 Index recorded a monthly increase of 4.14%, outperforming other indices such as the North China 50 (3.54%) and the ChiNext 50 (3.08%) [4] Market Structure - The market has exhibited a "dumbbell structure" with small-cap stocks like the CSI 2000 and North China 50 performing well, while mid-cap indices like the CSI 500 lagged behind [3][4] - This structure is attributed to low implied volatility in the market, leading investors to adopt a dual strategy of investing in large-cap core stocks for defense and small-cap stocks for potential gains [4] Investment Opportunities - The CSI 2000 Index is favored due to its smaller median market capitalization of 4.529 billion compared to the CSI 1000's 10.9 billion, indicating a stronger small-cap focus [4] - The small-cap stocks are expected to benefit from merger and acquisition policies, which can lead to value re-evaluation [4] - If risk appetite continues to improve, small-cap stocks may maintain their advantageous position in the market [5] Economic Factors - Domestic policies are showing resilience, with corporate earnings rebounding despite tariff impacts, supported by ongoing new policies [5][6] - Easing overseas risks, such as the temporary suspension of US-China tariffs, is boosting market sentiment and corporate revenue potential [6] - The market is also benefiting from liquidity support, with measures like reserve requirement ratio cuts expected to enhance market activity [6] Strategic Recommendations - Investors are advised to consider a strategy that combines dividend-paying stocks with small-cap investments to capitalize on the ongoing market trends [6]