Amazon’s Early Prime Day Sales Dropped 41%, Report Finds—But Amazon Calls That ‘Highly Inaccurate’

A report by Momentum Commerce indicated a 41% decline in Amazon Prime Day sales on its first day compared to last year, attributing this to the event's extended four-day duration fostering a 'wait and see' consumer approach, though still projecting overall growth. Amazon, however, strongly refutes these figures as 'highly inaccurate.' Despite Momentum's specific Amazon data, broader industry analytics from Adobe show overall online sales up over 10% for the day, suggesting robust e-commerce activity, potentially boosted by simultaneous sales from competitors like Walmart and a 'halo effect' from Prime Day, indicating a shifting landscape for online retail events and consumer spending patterns.

Analysis

Initial data on Amazon's Prime Day presents a conflicting narrative, creating uncertainty around the event's performance. A report from Momentum Commerce, representing a significant cohort of sellers, indicated a 41% year-over-year decline in sales on the first day, which the firm attributes to a strategic shift in consumer behavior in response to the event's extension from two to four days. This has fostered a 'wait and see' mentality, though Momentum still projects 9.1% overall growth for its clients for the full event. Amazon has vehemently refuted Momentum's figures as 'highly inaccurate,' stating it is 'pleased' with early results. Broadening the scope, Adobe Analytics data offers a counter-narrative, reporting that total online sales across all retailers rose over 10% to $7.9 billion on the first day. This suggests a robust e-commerce environment, potentially fueled by parallel sales events from competitors like Walmart and Target, creating a 'rising tide' effect. Adding to the complexity, tariff impacts are cited as a potential cause for lower average discounts (21% vs. 24% last year), which could affect both sales volume and margins. The core takeaway is that the extension of the sales period and heightened competition have fundamentally altered the dynamics of Prime Day, making single-day, year-over-year comparisons less reliable.

Key Decisions for Investors

• Investors should prioritize the broader e-commerce data from Adobe Analytics, which indicates strong consumer spending, over the disputed, seller-specific figures from Momentum Commerce to gauge the health of the retail sector.
• Monitor the performance of competitors like Walmart (WMT) and Target (TGT) to determine if Amazon is losing market share or if the Prime Day event is successfully expanding the overall e-commerce pie for all participants.
• Given the conflicting reports and the new four-day format, it is prudent to withhold definitive judgment on Prime Day's success until Amazon releases official results or more comprehensive post-event data becomes available, paying close attention to any commentary on gross margins.