Amazon (AMZN) has been one of the market's strongest large-cap technology stocks in 2026, helped by rapid growth in Amazon Web Services (AWS), advertising, and artificial intelligence. The company also delivered an impressive first quarter, beating Wall Street estimates.

But the story has recently shifted. Recently, Bloomberg reported that Senate investigators are examining allegations of Chinese influence over Amazon's third-party marketplace, sending AMZN shares down about 4% in a single session. 

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With second-quarter earnings due on July 30, investors are now weighing whether the investigation is simply a short-term headline or a more meaningful risk to Amazon's long-term outlook.

The Senate Investigation Creates a New Overhang

According to Bloomberg, Republican staff on the Senate Small Business Committee believe they have uncovered evidence suggesting some Amazon employees in China may have improperly influenced marketplace decisions involving third-party merchants.

The allegations involve intermediaries allegedly paying for favorable treatment, including reversing account suspensions and helping sellers navigate Amazon's marketplace policies.

Because nearly 60% of products sold on Amazon come from third-party sellers, any weakness in marketplace oversight could eventually attract additional regulatory scrutiny. At this stage, however, the inquiry remains a fact-finding investigation rather than an enforcement action.

The market reacted quickly because investors are concerned the probe could eventually lead to tighter oversight, operational changes, or financial penalties if wrongdoing is established.

Amazon's Business Continues to Impress Investors

While the Senate investigation grabbed headlines, Amazon's operating business continues to perform well.

AWS remains one of the company's biggest growth engines after expanding 28% year-over-year (YoY) during the first quarter. Management also guided second-quarter revenue to $194 billion to $199 billion, while forecasting operating income of $20 billion to $24 billion, which is due on July 30 after the market close.

Wall Street currently expects roughly $198 billion in revenue and approximately $1.82 billion in earnings per share for the upcoming quarter.