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The Nio EP9 self-driving concept electric vehicle (EV) is displayed during the media day of 17th Shanghai International Automobile Industry Exhibition on April 19, 2017 in Shanghai, China.

Check out the companies making headlines in midday trading.

Nio — Shares of the Chinese electric vehicle company tumbled 6% after it announced a $2 billion stock offering. The Tesla rival said it would use the proceeds to strengthen its balance sheet and for general corporate purposes.

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