Because the American economy is the weather vane of the global economy, and the American stock market can reflect the performance of the American economy. If the US stock market plummets, it means that the US economy is in a downturn, which will affect the global economy. Therefore, the US stock market crash will have an impact on the China stock market. However, the impact of US stocks on A shares depends on the situation. For example, in 2008, Lehman Brothers, the fourth largest investment bank in the United States, announced its application for bankruptcy protection, which triggered a global financial crisis.

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