The Philadelphia Semiconductor Index (SOX) is facing a decline of over $1 trillion in market value. This downturn follows a 3.1% drop on October 14, which contributed to a six-day decline of approximately 10%.
Currently, 22 out of the 30 companies within the SOX index are trading more than 20% below their peaks recorded in May and June 2026. This trend reflects a broader sector-wide repricing rather than isolated performance issues.
Market sentiment is pressured by rising interest rates and concerns over the high costs of AI infrastructure. Additionally, OpenAI reported an annualized revenue run rate of $50 billion, missing earlier forecasts of $70 billion.
Broadcom leadership has highlighted capital constraints and unrealistic market expectations regarding AI investments as key sources of investor concern. The selloff has extended beyond the US, impacting Asian markets including the KOSPI index.
The sector previously experienced a significant decline on June 5, 2026, when approximately $1.3 trillion was erased from chipmaker stocks. This event marked the worst single-day performance for the sector since March 2020.
