Qualitas Semiconductor showed sharp price movements even after the regular trading session closed on the 18th, with the volatility interruption mechanism (VI) triggered twice.

According to Korea Exchange data that day, a dynamic VI was triggered for Qualitas Semiconductor at 4:30:07 p.m. at 9,860 won. At the time, the dynamic VI reference price was 9,100 won and the deviation rate was 8.35%. The VI was lifted at 4:32:15 p.m., a little over two minutes later.

The price movement continued even after the lift. At 5:20:30 p.m., the dynamic VI was triggered again at 9,670 won. The reference price at the time was 9,120 won and the deviation rate was 6.03%.

◆ How the Dynamic VI Works The VI is a system designed to ease abrupt price changes by switching to single-price trading for a certain period when the price of an individual stock moves sharply beyond a set range in a short time. In particular, the dynamic VI operates when short-term price changes become large, based on the most recent executed price.

◆ Direction Cannot Be Judged... Only Supply-Demand Battles Confirmed The mere fact that a VI was repeatedly triggered for a stock cannot be used to judge whether its share price will rise or fall afterward. However, it does confirm that buy and sell orders clashed rapidly within a short time, expanding price volatility.

Short-term surges and plunges in the stock market can be influenced not only by company-specific news but also by changes in supply and demand, trading volume, and overall market sentiment. In particular, during relatively thin trading hours, even a small number of orders can amplify price swings, so it is necessary to examine executed prices and trading volumes together.

For Qualitas Semiconductor, the dynamic VI was triggered twice after the market close that day, showing a strong short-term supply-demand battle among investors. Whether such volatility will continue in the regular session going forward is expected to be a key checkpoint.

[This article was written with the assistance of AI. It is based on materials from the Korea Exchange and does not recommend buying or selling any specific stock. Stock prices can fluctuate sharply depending on supply and demand and market conditions, so please check the latest quotes and corporate disclosures before making investment decisions.]