Chip Stocks Slide as Kospi Reversal Signals Possible Semiconductor Consolidation

Semiconductor shares sold off on May 12, 2026, after South Korea’s Kospi formed a bearish “key reversal day,” a technical signal analysts said may point to consolidation across highly correlated chip-linked markets. The Kospi rose 4.3% on May 11 to a record close, then opened higher on May 12 and hit an intraday high before reversing sharply to close below the prior day’s low. Oppenheimer technical analyst Ari Wald said the move showed fatigue after a 48.2% rally from March 30 to the May 11 record, though he said it was too early to call an end to the uptrend. The Philadelphia Semiconductor Index fell 3% on May 12, with 29 of its 30 components declining. MarketWatch, citing FactSet data, said the SOX and Kospi had a 0.98 correlation since March 30 and 0.95 over the past year. Fundstrat’s Mark Newton said the SOX’s 69.1% rally since late March was historically unusual and may require a “meaningful consolidation.”