Amkor (AMKR) Shares Drop in Broad Chip Selloff on AVGO Guidance Miss, Strong Jobs Data

Amkor Technology (AMKR) shares tumbled on June 5, 2026, as a global semiconductor selloff erased year-to-date gains, triggered by Broadcom's (AVGO) revenue guidance miss and a stronger-than-expected U.S. jobs report. The dual shocks reset expectations for AI chip spending and introduced rate-hike risk, hitting high-multiple semiconductor valuations. The rout was global: South Korea's Kospi fell 5.5%, with Samsung down 6.4% and SK Hynix nearly 10%. European chip equipment maker ASML declined 3.8%, while Infineon lost over 6%. Amkor, a key packaging and test supplier, has been highly volatile, registering 47 moves greater than 5% in the past year. Today's drop signaled market concern but did not alter the fundamental business outlook. Just three days prior, Amkor shares gained 3.7% following Nvidia's GTC Taipei announcements, including the Vera Rubin AI platform and RTX Spark PC chip, highlighting its exposure to the AI supply chain. Amkor remains up 57.7% year-to-date despite the pullback.