The Korea Exchange reported that the KOSPI stock market triggered a record 29,357 Volatility Interruption (VI) cases during the first half, the highest for any half-year period on record. The surge in circuit breakers occurred as the KOSPI broke 5000 in January and exceeded 9000 on the 18th of last month, driven by a semiconductor stock rally that attracted aggressive buying and short-term profit-taking. Contributing factors included geopolitical risks such as the US-Iran war outbreak and the domestic launch of single-stock leveraged ETFs. The Korea Exchange's market warning system escalated to unprecedented levels, with investment risk designations — the highest alert category — increasing twentyfold compared to the same period last year.
KOSPI VI Triggers Reach 29,357 Cases in First Half
According to data from the Korea Exchange on the 5th, VI triggers totaled 29,357 cases in the first half, surpassing the previous half-year record of 24,401 cases set during the first half of 2020 amid the COVID-19 pandemic. The VI mechanism serves as a volatility dampener for individual stocks, converting affected securities to single-price trading for two minutes when triggered.
Intraday Volatility Hits 3.30%, Second Highest on Record
The average KOSPI intraday volatility rate reached 3.30% during the first half, marking the second-highest level on record. The all-time high remains 3.51% from the first half of 1998. Intraday volatility is calculated by dividing the difference between the daily high and low by the average of those two values, with larger index swings producing higher volatility readings.
KOSPI Rally Drives Market Fluctuations
The KOSPI broke through the 5000 level for the first time in January and continued climbing, exceeding 9000 on the 18th of last month. As the semiconductor-led rally intensified, chase buying and short-term profit-taking surged, amplifying market swings. Geopolitical risks including the US-Iran war outbreak and the domestic launch of single-stock leveraged ETFs further increased volatility.
Investment Risk Designations Surge Twentyfold
Investment risk designations — the highest tier in the Korea Exchange's market warning system — reached 43 cases during the first half, compared to just 2 cases in the same period last year. The exchange uses a three-tier system (investment caution, investment warning, investment risk) to alert investors to potential unfair trading in stocks showing concentrated trading in a small number of accounts or rapid price increases. Stocks designated as investment warnings may face trading halts if prices continue surging after designation. Investment risk stocks are halted for one day upon designation. Investment warning designations totaled 379 cases, exceeding last year's 35 cases by more than tenfold, while investment caution designations reached 2,944 cases versus 271 cases last year.
FAQ
What caused the record VI triggers in the KOSPI stocks during the first half?
The Korea Exchange reported 29,357 VI triggers as the KOSPI broke 5000 in January and exceeded 9000 on the 18th of last month. The semiconductor stock rally attracted aggressive buying and short-term profit-taking, while geopolitical risks such as the US-Iran war outbreak and the domestic launch of single-stock leveraged ETFs amplified volatility.
How does the KOSPI intraday volatility rate compare to historical levels?
The average KOSPI intraday volatility rate reached 3.30% during the first half, the second-highest on record. The all-time high remains 3.51% from the first half of 1998. Intraday volatility measures the difference between daily highs and lows divided by their average.
What are investment risk designations in the Korea Exchange system?
Investment risk designations represent the highest alert tier in the Korea Exchange's three-level market warning system. Stocks receive this designation for potential unfair trading indicators such as concentrated trading or rapid price increases. Investment risk stocks are halted for one day upon designation. The first half saw 43 investment risk designations compared to 2 cases in the same period last year.
