What led to the flash crash in China Concepts Stock?

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What led to the flash crash in China Concepts Stock? - TechTechChina

In the past 15 months, China Concepts Stock’s market value has plummeted by nearly 10 trillion yuan ($1.37 trillion), which is equal to 10% of China’s GDP (the world’s second-largest economy). All Chinese stocks have nearly halved in value. Share price dropping of over 90% is quite normal.