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Used-car retailer Carvana's shares skid in debut

Shares of Carvana, which uses vending machine-like towers to sell used cars, plunged as much as 17 percent in their debut on Friday.

| UPDATED: 4/28/17 10:77 am ET - adds details

Mazda quarterly operating profit plunges 56%

Mazda's operating profit tumbled 56 percent in the latest quarter, as a deteriorating sales mix, foreign exchange rate losses and recall costs undermined results.