Amazon Fell 4.6% Today Because Other Companies Said They Would Spend More Money. It Reports July 30.

Amazon shares dropped 4.6% Thursday after Alphabet and Tesla disclosed plans to increase capital spending, sparking concern the e-commerce giant may raise its $200 billion AI infrastructure guidance when it reports second-quarter earnings on July 30. The selloff occurred without any direct news from Amazon, as traders repriced the stock on the assumption that the company will match or exceed competitors' AI investments.

The market reaction highlights investor sensitivity to capital expenditure guidance across Big Tech. Alphabet and Tesla's announcements triggered a sector-wide reassessment of how much cash flow will be consumed by AI buildouts rather than returned to shareholders. Amazon's cloud computing unit, AWS, competes directly with Alphabet's Google Cloud, making comparable capex levels a key competitive metric.

A separate Senate inquiry into Amazon's marketplace practices also weighed on sentiment Thursday, though the capex overhang drove the bulk of the decline.