2026.04.24 Doosan Tesna(131970) Korea Stock Analysis - Neutral
📌 Company Overview
Doosan Tesna (두산테스나, KOSDAQ: 131970) is a South Korean semiconductor testing specialist founded in 2002 and headquartered in Pyeongtaek, Gyeonggi-do. The company provides back-end semiconductor testing services — primarily final testing (FT) and wafer-level testing — for fabless and IDM clients. Doosan Tesna has established itself as one of Korea's leading OSAT (Outsourced Semiconductor Assembly and Test) players, with an expanding client portfolio that now spans domestic chipmakers to global big tech giants including Tesla, Apple, and NVIDIA. The company operates under the Doosan Group umbrella and is co-led by CEOs Kim Yun-geon and Jo Hoon.
📈 Current Stock Price
| Item | Value |
|---|---|
| Current Price | ₩122,400 |
| Daily Change | ▼ ₩3,300 (-2.63%) |
| Trading Volume | 513,716 shares |
| 52-Week High | ₩129,100 |
| 52-Week Low | ₩22,050 |
| Market | KOSDAQ |
(As of 2026-04-24 23:27 KST, market close)
Doosan Tesna has surged approximately 3x since early March 2026, rising from around ₩44,000 to a 52-week high of ₩129,100 on April 23. Today's session saw a mild pullback of -2.63% as the market digested the investment warning designation issued by the Korea Exchange (KRX) effective April 24, 2026. The stock remains near multi-year highs, driven by the landmark announcement of an NVIDIA AI chip testing contract.
🔧 Technical Analysis
| Indicator | Value | Signal |
|---|---|---|
| 5-Day MA | ₩118,560 | Price above → Bullish |
| 20-Day MA | ₩101,790 | Price above → Bullish |
| 60-Day MA | ₩82,148 | Price above → Bullish |
| RSI (14) | 74.33 | ⚠️ Overbought (>70) |
| MACD | 9,401.85 | Above signal line → Buy |
| MACD Signal | 7,166.01 | — |
| MACD Histogram | +2,235.85 | Positive (bullish momentum) |
The moving averages form a perfect bullish alignment — MA5 > MA20 > MA60 — confirming a strong uptrend in place since mid-March 2026. However, the RSI at 74.33 has entered overbought territory (above 70), and the MACD histogram, while still positive, appears to be approaching a peak. The +15.6% single-day surge on April 22 followed by a -2.63% correction on April 24 signals early signs of short-term overheating. Key support sits at ₩108,000 (prior breakout level) and resistance at the 52-week high of ₩129,100.
💰 Fundamental Analysis
| Metric | FY2024 | FY2025 | YoY Change |
|---|---|---|---|
| Revenue | ₩373.1B | ₩303.9B | ▼ -18.6% |
| Operating Profit | ₩37.9B | ▼ -₩940M | Turned to loss |
| Net Income | ₩36.8B | ₩1.51B | ▼ -95.9% |
| Total Assets | ₩787.7B | ₩703.8B | ▼ -10.6% |
| Total Equity | ₩437.7B | ₩437.1B | ≈ Flat |
| Debt/Equity Ratio | ~80% | ~61% | ▲ Improved |
FY2025 results confirmed an earnings trough: revenue declined 18.6% YoY to ₩303.9B and operating profit turned negative (-₩940M), while net income collapsed 95.9% to ₩1.51B. This reflects a cyclical downturn in semiconductor demand and the challenging testing market environment. On a positive note, the debt/equity ratio improved significantly from ~80% to ~61%, indicating sound balance sheet management. The current stock price is aggressively pricing in an earnings recovery expected in 2026 and beyond, driven by AI chip testing demand — making the stock technically overvalued on trailing fundamentals but forward-looking on AI growth expectations.
📰 Recent News & Disclosures
Key News:
- [The Bell] Doosan Tesna to handle NVIDIA AI chip testing — The company secured NVIDIA as a new client, becoming the third global big tech customer after Tesla and Apple. This landmark deal validates Doosan Tesna's world-class testing capabilities in AI accelerators. (Apr 24, 2026)
- [Disclosure] Doosan Tesna designated as Investment Warning stock — KRX designated the stock as an Investment Warning issue effective April 24, 2026, due to the rapid price surge. Further price increases could trigger a temporary trading suspension. (Apr 23, 2026)
- Doosan Tesna: Investment Warning designation → trading halt risk on further rise — The company disclosed the warning designation and cautioned investors about potential trading suspension. (Apr 23, 2026)
- PS Electronics issues ₩11.8B exchangeable bonds — The exchange target is Doosan Tesna common shares (84,700 shares) at an exchange price of ₩140,164 per share, exercisable from May 11, 2026 to April 4, 2031. This implies a market-based reference price near the analyst target. (Apr 23, 2026)
Recent DART Disclosures:
- National Pension Service large shareholding report (Apr 1, 2026) — NPS disclosed a significant position, signaling institutional recognition.
- Corporate Value Enhancement Plan (voluntary disclosure) (Apr 1, 2026) — Company announced a voluntary shareholder value improvement plan.
- CEO change (Mar 31, 2026) — New co-CEO appointment confirmed at the AGM.
- Annual Report (FY2025) (Mar 23, 2026) — Full year results filed confirming the earnings trough.
⚖️ Bull vs Bear Factors
| 🐂 Bull Factors | 🐻 Bear Factors |
|---|---|
| NVIDIA AI chip testing contract secured — 3rd global big tech client (after Tesla & Apple) | Investment Warning designation (Apr 24, 2026) — trading suspension risk if prices continue rising |
| Korea Investment & Securities maintains ₩166,000 target price; top pick for AI computing chip outsourcing | FY2025 operating loss (-₩940M) and net income -95.9% — current valuation fully priced for recovery |
| Portfolio expansion into ADAS chips and AI accelerator testing — high-value product diversification | Short-term overbought: RSI at 74.33; foreign investors and institutions taking profits after the ~3x run-up |
| Improved balance sheet: debt/equity ratio down from 80% to 61% | PS Electronics exchangeable bonds create potential share supply overhang (84,700 shares at ₩140,164) |
| AI semiconductor testing market is a structural multi-year growth story | Stock up ~3x in 6 weeks — aggressive momentum unwinding risk |
🎯 Investment Opinion: Neutral
Doosan Tesna represents a compelling mid-to-long-term AI infrastructure play within the Korean semiconductor testing ecosystem. The NVIDIA client win — following Tesla and Apple — materially de-risks the long-term revenue story and justifies a re-rating of the stock. Korea Investment & Securities' target of ₩166,000 remains intact, implying ~35% upside from current levels.
However, short-term caution is warranted. The stock has surged approximately 3x in six weeks, RSI has entered overbought territory at 74.33, and the KRX investment warning designation creates regulatory risk of a trading halt on any further sharp advance. The FY2025 earnings trough means the stock is pricing in aggressive forward growth that has yet to materialize in reported numbers.
- Short-term target price: ₩140,000
- Mid-term analyst target (Korea Investment & Securities): ₩166,000
- Stop-loss level: ₩100,000 (key psychological support)
- Strategy: Existing holders → consider partial profit-taking near resistance (₩129,100). New entries → wait for consolidation near ₩100,000–108,000 support and enter in tranches.
Note for international investors: Doosan Tesna trades in Korean Won (KRW). Investments in KOSDAQ-listed stocks involve foreign exchange risk in addition to equity market risk. The investment warning designation is a KRX regulatory measure specific to the Korean market and does not exist in most other exchanges.
⚠️ Investment Disclaimer
This post is for informational purposes only and does not constitute investment advice. All investment decisions are the sole responsibility of the investor. Korean stock market investments involve currency risk for international investors. Past performance does not guarantee future results.
🇰🇷 Korean Version: https://kai-search.tistory.com/manage/posts/
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