China's stock markets have experienced significant volatility in recent days, initially rallying on expectations of a substantial fiscal stimulus package but later declining due to unmet expectations from announced measures. The CSI 300 index surged by 1.9% amid hopes for a new stimulus, but fell by 2.8% as investors grew cautious ahead of a crucial fiscal policy briefing scheduled for Saturday. Analysts predict that the government may unveil a stimulus package worth approximately 2 trillion yuan ($283 billion) to bolster the economy. This anticipated announcement has led to increased trading activity in exchange-traded funds (ETFs) in both the U.S. and Europe, reflecting global investor sentiment. The Ministry of Finance is expected to provide details on the stimulus, which could include additional special government bonds aimed at economic recovery. However, some experts caution that the measures may only offer a temporary boost rather than a long-term solution to the economic challenges facing China.