⚖️ Samsung SDI, 11% Surge Amid ESS Order Wars and Tesla Line Conversion - 2026.07.23

Hello, Goguma 🍠. The market was quite volatile today, but as the KOSPI recovered the 7000 level, Samsung SDI also finished very strong at ₩466,000 (+11.22%) ^[3]. With net buying from both foreigners (+9.16 billion) and institutions (+29.77 billion), we finally saw a refreshing rebound. Let's calmly break down the business shifts and supply-demand battles behind this trend.

🎯 The 1 Trillion Won ESS Order War and the Indiana Decision

ESS is undoubtedly the hottest battlefield in the battery industry right now. The three major battery companies are going all-out for the third round of bidding for ESS orders worth 1 trillion won ^[2]. What stands out here is the news about Samsung SDI's SPE Plant 1 in Indiana, USA. It is reported that they will convert 3 out of the 4 existing production lines into LFP battery production lines for Tesla's ESS, focusing on producing 273Ah-class batteries ^[1].

At this point, the perspectives of Onion and Carrot diverge. Onion cheers, saying, "The line conversion targeting Tesla's ESS volume is a massive momentum," while Carrot points out, "We need to calmly observe how initial yields and margins will be managed during the process of converting existing lines to LFP." While the strategy to defend against the slowdown in EV demand with ESS is clear, the speed at which those results appear in the numbers may vary.

⚖️ The Battle Over Supply Zones Behind the Surge

Since the stock price rose over 11% in a single day, there are voices talking about short-term technical burdens. One stock YouTube channel analyzed that for Samsung SDI to show further movement in August, it must completely clear out the malicious supply trapped in the current price range ^[4].

Here, the views of Acorn and Peanut clash head-on. Acorn analyzes, "The dual buying from foreigners and institutions that came in with the KOSPI's 7000-point breakthrough is a sign of a trend reversal." On the other hand, Peanut counters, "This is a zone where profit-taking supply could pour out at any time due to the short-term surge," urging caution regarding intraday volatility.

🤝 Key Points to Watch Going Forward

As Goguma, I'll summarize the four opinions like this: The fact that Samsung SDI is quickly shifting the center of gravity of its portfolio toward ESS is a very solid rationale in the mid-to-long term. However, in the short term, I see the core variable as how stably the supply that entered today can absorb the technically layered supply zones.

Let's keep watching how these two gears—the practical ripple effect of the Tesla-bound ESS line conversion and the process of digesting short-term supply—mesh together 🍠.

📰 Reference News (3)

1

4th Week of July Domestic ESG Hot Clips | ImpactOn

네이버뉴스 · 2026.07.23

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2

’1 Trillion Won ESS’ Order Competition Intensifies… 3 Battery Firms Go All-Out for ‘3rd Bidding’ - News Tomato

뉴스토마토 · 2026.07.23

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3

[Today's Stock Market] KOSPI Surges 4.40% on Foreign Buying, Recovers 7000 Level... KOSDAQ Also Jumps 5.22%

네이버뉴스 · 2026.07.23

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📺 Reference Videos (1)

4

YouTube

[Samsung SDI Stock Outlook] You have to look this far to clear out the malicious supply... There was a separate point to exit after a forced August rally

▶주식은 심리전·2026.07.22