After Surpassing 8,000 Points, Is Profit-Taking Underway?... Why Is the KOSPI Plunging?

KOSPI Drops Over 5%, Triggering Sell-Side Sidecar

Profit-Taking Seen After Rapid Surge

On the 15th, when the KOSPI index surpassed 8,000 points intraday for the first time in history, employees at Hana Bank dealing room in Jung-gu, Seoul celebrated the KOSPI passing 8,000. 2026.5.15 Photo by Jin-Hyung Kang

The KOSPI, which surpassed the 8,000-point mark for the first time ever early in the session, was unable to maintain its upward momentum and sharply reversed into a steep decline. The market interprets this as investors realizing profits after the KOSPI's rapid rise.

According to the Korea Exchange, at 1:28:49 p.m. on the 15th, a sidecar was triggered, which suspends the effectiveness of program sell orders for five minutes, due to volatility in the KOSPI 200 futures index.

This is the first time in about a month that a KOSPI sell-side sidecar has been triggered, the last occurrence being on the 2nd of last month. A sell-side sidecar is activated when the KOSPI 200 futures index falls by 5% or more and the drop continues for one minute.

The KOSPI set a new record in the early session by climbing to 8,040 points, but then dropped to the 7,500 range due to heavy selling by foreign investors.

As of 2:08 p.m., the KOSPI was trading at 7,541.99, down 5.51% from the previous trading day. Foreign investors have recorded a net sell of approximately 4.5 trillion won in KOSPI stocks. This marks the seventh consecutive trading day of large net selling since the 7th. On this day, institutions also joined with net selling of over 500 billion won, while only individual investors recorded a net buying of more than 5 trillion won.

Han Ji-young, a researcher at Kiwoom Securities, said, "From May until the 14th, the KOSPI surged by 20.9%, and we are now seeing aftereffects from the rapid pace and the extreme concentration in a few sectors." She added, "The concentration has been so severe that only two sectors—semiconductors and automobiles—have outperformed the KOSPI, so the market appears to be using factors such as U.S. interest rates and war-related noise as an excuse to adjust the pace."

This content was produced with the assistance of AI translation services.