August 3, 2015 12:05 PM EDT

After climbing by 150% in the last year, China’s stock market has taken a tumultuous turn. The market has fallen by 30% over the past month, sparking worries amongst investors across the globe.

What happened to the Chinese stock market, and how did it take such a steep plunge? Watch the video above to find out.

Contact us at letters@time.com.

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