Philadelphia Semiconductor Index falls 21.9%... October 6 to November 2

The Philadelphia Semiconductor Index (SOX) fell 21.9% from its October 6 peak of 13,217.82 to 10,328.33 on November 2, according to Nasdaq data, with the 30-component index's decline masking wide dispersion among individual names. ChainNews ABMedia, comparing highest closing prices after October 5 with November 2 closes, tallied Intel ($INTC) down 48.4% to $59.97, Kioxia (285A) down 40.7% to ¥11,345, and Marvell Technology ($MRVL) down 40.3% to $171.41. The pullback hit chip stocks unevenly, with declines, earnings outlooks, and trading patterns differing stock by stock rather than reflecting a uniform selloff. The move matters because the SOX is a key barometer for semiconductor sector sentiment, and the steep single-name drawdowns in memory and networking chip names signal pressure beyond broad market weakness. Watch next: whether the index stabilizes near the 10,300 level and how upcoming earnings guidance from the hardest-hit constituents shapes sector positioning.