A weekly recap of the most interesting venture capital deals, funds and start-ups. : Walmart plans to acquire the grocery delivery start-up Cornershop for $225 million. The company, which operates in Latin America, had raised around $20 million in venture funding from Accel, Endeavor Global, Jackson Square Ventures and others. Like Instacart, customers can use Cornershop to send a personal shopper to the grocery to pick up, and then deliver the items they want to their homes. Chinese electric car company Nio made its Wall Street debut on Wednesday.