市场分析：防御行业走强，A股震荡上行

Market Overview - On May 7, the A-share market opened high but experienced slight fluctuations, with the Shanghai Composite Index finding support around 3328 points[2] - The Shanghai Composite Index closed at 3342.67 points, up 0.80%, while the Shenzhen Component Index rose 0.22% to 10104.13 points[8] - Total trading volume for both markets reached 150.53 billion yuan, above the median of the past three years[3] Sector Performance - Strong performers included aerospace, agriculture, transportation equipment, and precious metals, while gaming, internet services, semiconductors, and cultural media lagged[3] - The average P/E ratios for the Shanghai Composite and ChiNext are 13.56 and 35.78, respectively, indicating a mid-level valuation suitable for medium to long-term investments[3] Investment Strategy - The market is expected to maintain a steady upward trend, driven by both policy and performance factors, with a focus on sectors with high earnings certainty and clear policy catalysts[3] - Short-term investment opportunities are recommended in aerospace, shipbuilding, transportation equipment, and precious metals[3] Risk Factors - Potential risks include unexpected overseas economic downturns, domestic policy changes, and macroeconomic disturbances that could impact recovery[4]