Alteogen (196170) closed higher in the regular session on the 20th, posting a double-digit gain.

Alteogen finished trading at 339,500 won, up 36,000 won (11.86%) from the previous trading day. This marks consecutive strength following its rise on the 19th. With the closing price exceeding the 330,000-won level, attention is also focusing on the stock's future movements.

The overall mood on the KOSDAQ market was also positive. The KOSDAQ index closed at 840.89, up 16.43 points (1.99%) from the previous trading day, recovering the 840 level.

Among top market-cap stocks, Alteogen's gain stood out. While many large-cap stocks including EcoPro, EcoPro BM, Rainbow Robotics, Jusung Engineering, and Wonik IPS rose, Alteogen surged more than 11%.

The domestic stock market has recently shown expanding volatility. The KOSDAQ index rose for five consecutive trading days from the 10th to the 14th, then turned downward on the 18th and 19th, before shifting back to strength on the 20th.

Attention is now focused on whether Alteogen's double-digit rise will continue or whether the stock will enter another volatile phase.