The Korean stock market triggered a circuit breaker on July 16 at 09:10:26 as the KOSPI index fell more than 5% in early trading, breaking below the 7,000 level for the second time. The Korea Exchange activated a sell-side sidecar — a temporary halt on program sell orders — after KOSPI200 futures dropped 5.22% to 1,104.40, marking the 37th such event this year and the first since July 13. The sharp decline followed concerns over AI infrastructure investment sustainability, amplified by a Morgan Stanley report citing data center project cancellations and delays due to rising electricity costs and environmental burdens. This regulatory mechanism suspends program trading for five minutes when the most-traded KOSPI200 futures contract moves 5% or more and holds that level for one minute. The selloff occurred despite overnight gains in US markets, where major indices closed higher on easing wholesale inflation data.
Korea Exchange Activates Circuit Breaker on July 16 Morning
The Korea Exchange announced the sell-side sidecar activation at 09:10:26 on July 16 after KOSPI200 futures declined 5.22% to 1,104.40 compared to the previous trading day's close. The exchange's rules trigger the mechanism when the most-traded KOSPI200 futures contract rises or falls 5% or more and sustains that movement for one minute, halting program buy or sell orders for five minutes. This marked the third trading day since the last sidecar event on July 13.
Samsung Electronics and SK Hynix Lead Index Decline
As of 09:35 on July 16, Samsung Electronics traded at 258,500 won, down 7.51% from the previous session, while SK Hynix fell 10.04% to 1,873,000 won. Other major stocks declined, including SK Square (down 11.36%), Samsung Electro-Mechanics (down 9.34%), Hyundai Motor (down 1.50%), and Samsung Life Insurance (down 2.67%). LG Energy Solution rose 2.99%, KB Financial gained 1.16%, and Samsung Biologics increased 0.51%. The KOSDAQ index dropped 19.70 points (2.38%) to 809.73 at the same time.
Foreign and Institutional Investors Dump Korean Stocks
Foreign investors sold a net 98.3 billion won in the securities market during early trading on July 16, while institutional investors offloaded 108.4 billion won. Retail investors purchased a net 212.2 billion won, acting as the sole buying force in the market.
Morgan Stanley Report Highlights Data Center Project Cancellations
The morning selloff intensified after a Morgan Stanley report identified expanding cancellations and delays of data center projects due to electricity rate increases and environmental concerns. The analysis concretized previously raised worries about AI infrastructure investment sustainability, significantly dampening investor sentiment.
US Semiconductor Stocks Fall Despite Broader Market Gains
US markets closed higher on the previous night, with the Dow Jones Industrial Average up 150.37 points (0.29%) to 52,658.64, the S&P 500 rising 28.81 points (0.38%) to 7,572.40, and the Nasdaq Composite gaining 162.22 points (0.62%) to 26,269.23. However, semiconductor stocks declined as investors rotated into large tech platform companies. Micron Technology fell 8.02%, Intel dropped 4.43%, and AMD declined 3.46%, pulling the VanEck Semiconductor ETF down 1.6%. SK Hynix American Depositary Receipts closed 9.00% lower at $176.46 per share. Kim Yu-mi, a researcher at Kiwoom Securities, stated that Korean stocks are retracing some of the previous day's semiconductor-led gains, with profit-taking in recently surged AI and semiconductor stocks while buying interest shifts to large platform companies like Apple, Alphabet, and Amazon.
FAQ
What triggered the KOSPI circuit breaker on July 16?
The Korea Exchange activated a sell-side sidecar at 09:10:26 on July 16 after KOSPI200 futures fell 5.22% to 1,104.40, meeting the threshold for a temporary halt on program sell orders. The mechanism activates when the most-traded KOSPI200 futures contract moves 5% or more and holds that level for one minute.
How much did Samsung Electronics and SK Hynix stocks fall on July 16?
As of 09:35 on July 16, Samsung Electronics traded at 258,500 won, down 7.51% from the previous session, while SK Hynix declined 10.04% to 1,873,000 won.
Why did Korean stocks fall despite US market gains?
A Morgan Stanley report citing data center project cancellations due to electricity costs and environmental burdens raised concerns about AI infrastructure investment sustainability. Additionally, US semiconductor stocks fell as investors rotated into large tech platforms, with Micron down 8.02% and SK Hynix ADR dropping 9.00% to $176.46.
