Carvana (CVNA)  CEO Ernie Garcia isn't worried about Amazon's (AMZN)  auto business.

Carvana, which debuted as a public company in April 2017, sells used cars online and is known for its network of physical car "vending machines."

Carvana's business is difficult to replicate, according to Garcia. Its stock is up roughly 108% since the start of the year.

Meanwhile, Garcia is keeping an eye on how trade negotiations between the U.S. and other countries go, but Garcia thinks any impact pales in comparison to the growth his company is seeing. Revenue for its most recent quarter grew 127% to some $360 million.

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