China Evergrande has had a wild ride on the stock market in the 3 weeks since trading was resumed

• China Evergrande's shares have been extremely volatile since they resumed trading on August 28.
• The stock tanked 25% early on Monday following news that some of its wealth management unit staff have been detained.
• They had slumped over 80% on August 28. A week later, they rallied by over 80% in a single day.

Embattled Chinese real-estate developer Evergrande is likely keeping investors up at night — the company's shares have been on a wild ride since they resumed trading on August 28 following a lengthy suspension.

On Monday, shares of China Evergrande Group plunged 25% in early trade following news that police in the southern city of Shenzhen detained some staff at its wealth management unit.