Here's What September Has Done to AMD Stock Over the Past 10 Years

An analysis of Advanced Micro Devices (AMD) historical seasonality highlights that September has historically been the chipmaker's weakest month over the past decade. AMD shares have declined in eight of the past 10 Septembers, recording a median monthly drop of approximately 5%. This contrasts sharply with AMD's typical monthly performance across the 120-month decade, which averages a median gain of 1.6%. The broader market provides only partial context for this underperformance. While the S&P 500 dropped in five of those ten Septembers with a roughly flat median return, AMD declined in every down month for the index and also declined in three of the five Septembers when the index moved higher. The historical extremes ranged from a 25% drop in September 2022 to a 23% gain in September 2018. Despite the historical seasonal weakness, analysts emphasize that there is no structural fundamental driver or specific calendar catalyst behind the trend. Consequently, the historical data should serve merely as context for short-term volatility rather than a catalyst to sell long-term holdings.