Amazon Compresses Seller Metrics Window From 90 to 60 Days for High-Volume Categories

Amazon has compressed the rolling window used to calculate key seller performance metrics from 90 days to approximately 60 days for high-volume product categories, according to marketplace analysts tracking Buy Box algorithm changes in 2026.

The shorter measurement window means a single month of elevated order defect rate or late shipment rate now affects a seller's Buy Box eligibility more quickly than under the previous 90-day standard. The change cuts both ways: sellers who improve their performance after a rough patch will also see their metrics recover faster than before.

Analysts note that Amazon has also introduced logic that detects and discounts pricing signals from sellers who have listed an offer for less than 30 days, an anti-manipulation measure designed to prevent sellers from creating new accounts to post artificially low prices that competitors might otherwise match. For repricing software users, the practical implication is to avoid matching new-entrant prices, since they are increasingly treated by Amazon's own algorithm as unreliable market signals rather than genuine competitive benchmarks.