经过两次变轨，沪指加速，上方关键阻力在4000点！

Core Viewpoint - The market has shown unexpected strength, with the Shanghai Composite Index quickly rebounding after a brief adjustment at the 3700-point level, indicating a strong upward momentum in the current market phase [1]. Group 1: Market Performance - The Shanghai Composite Index has undergone two significant trend changes, with the first occurring after breaking the key resistance at 3400 points, which opened up upward potential and set a target of 3650 points [3]. - After reaching 3630 points, the index adjusted to 3550 points before resuming its upward trend, breaking through 3650 points and continuing to rise [6]. - The second trend change occurred after surpassing the 3700-point mark, with the index experiencing a brief consolidation before accelerating again [6]. Group 2: Technical Analysis - The current market movement is characterized as being in the third wave of the Elliott Wave Theory, which is typically the strongest phase of a market cycle [10]. - The index is approaching the upper resistance level of the upward channel, with a critical resistance point identified at the 4000-point level, which aligns with historical highs [8]. Group 3: Future Outlook - There is caution advised regarding potential larger adjustments following rapid upward movements, especially after the anticipated interest rate cuts from the Federal Reserve in September [8]. - The market's strong performance is attributed to technical factors rather than fundamental ones, suggesting a focus on trading strategies and timing for investors [12].