Samsung SDI (006400) plunged more than 5% in trading on the 23rd, ahead of the weekend, falling below the 500,000-won level for the first time in about two months, since August 25. Attention is now focused on whether the company can lay the groundwork for a rebound in the new trading week.

■ Down 5.37% in a Day... Back into the 400,000-Won Range

Samsung SDI finished after-market trading at 484,500 won on the 23rd, down 27,500 won (-5.37%) from the previous trading day. With the stock re-entering the 400,000-won range, investors' attention is turning to the possibility of a recovery going forward.

What stands out is the size of the day's decline. The stock slid more than 5% in a single day, breaking below the 500,000-won level, making the key question whether further downward pressure will emerge or whether bargain hunters will step in and attempt a rebound.

■ Rebound Variables... EV and ESS Demand

Samsung SDI has drawn market attention for its secondary battery business, centered on batteries for electric vehicles as well as batteries for energy storage systems (ESS). Changes in electric vehicle market demand, the competitive landscape of the global battery industry, and whether its ESS-related business expands are notable factors to watch in assessing the future direction of the stock.

However, expectations for the industry's mid- to long-term growth do not guarantee a short-term stock rebound. Amid the recent weakness, investors also need to consider earnings outlooks, supply and demand changes, and the overall market sentiment.

■ In Contrast to KOSPI's Modest Rise... Key Issue Is 'Recovering the 500,000-Won Level'

The KOSPI index closed at 5,550.30 on the 23rd, up 16.53 points (+0.30%) from the previous trading day. In contrast to the index's modest rise, Samsung SDI fell sharply, showing a divergent movement.

Ultimately, the key issue going forward is whether Samsung SDI can recover the 500,000-won level. Having fallen below 500,000 won for the first time in about two months, whether the stock can re-enter that range is emerging as a major focus of the new trading week. Investors are keenly watching whether Samsung SDI, which declined ahead of the weekend, can lay the foundation for a rebound in the new week or whether the bearish trend will continue.

[This article is provided for informational purposes as investment reference material and does not recommend the purchase or sale of any specific stock. Conditions may vary depending on market circumstances. Investment decisions and any resulting responsibility rest with the investor.]