Amazon on Thursday tried to temper investor concerns about the impact of the Trump administration's tariffs on its e-commerce business, but the company may have few options left to ensure small third-party sellers stay put in the face of crushing levies.

Quarterly earnings from two of the world’s most valuable companies show how President Donald Trump’s trade wars threaten their bottom line.

As shoppers step up purchases to avoid tariff impacts, Amazon and its sellers may struggle to avoid price increases as they blow through inventory.