SK Square on Korea Invest Insights

Korean Stock Screener Top 5: Apr 16, 2026

Sat, 18 Apr 2026 09:00:00 +0900

Korean Stock Screener Top 5 (Week of Apr 16, 2026): Names Passing Multiple Independent Filters

Each week, our quantitative framework runs ten independent screeners across 459 uniquely identified Korean-listed securities. This report surfaces the five names that cleared the highest number of those screens simultaneously during the period April 9–16, 2026 — and explains why intersection, not single-screen, is the meaningful unit of analysis.

Why Intersection Screening Matters

Most quantitative stock screens are single-thesis tools: a mean-reversion screen finds names that have corrected deeply; a momentum screen finds names in price uptrends; a smart-money flow screen finds names where institutional positioning is building. Any one of these can produce false positives — a stock passes a mean-reversion filter merely because it has fallen, not because a genuine inflection is underway.

Intersection screening applies a different logic. When a security simultaneously clears screeners built on opposing assumptions — for example, both a post-correction rebound model and an earnings-surprise momentum model — the overlap is structurally informative. The two frameworks were not designed to agree; their simultaneous activation suggests the name carries multiple independent tailwinds rather than a single transient factor. In academic terms, the intersection reduces factor-specific noise and amplifies the signal-to-noise ratio of each individual screen.

Our ten screeners target distinct market regimes: Mean Reversion (deep-correction snapbacks), PEAD (Post-Earnings Announcement Drift — price momentum following earnings surprises), Quality Compounder (ROE/ROIC/earnings-growth compounders), Quiet Accumulation (stealth institutional accumulation before broader market awareness), three Smart Money Flow variants, Value Quality (cheap-on-fundamentals with quality filter), and Cycle (sector rotation tied to macro regimes). Because the design assumptions of these screeners conflict, a name appearing in the top tier of five or more is — by construction — not a single-factor artifact.

The five names below represent those with the highest intersection counts from a scan of 459 Korean-listed companies across up to three daily snapshots during the coverage period. They span five distinct regimes (mean reversion, deep value turnaround, breakout momentum, holding-company re-rating, and smart-money biotech), which provides natural regime diversification from a portfolio construction standpoint.

Important framing: Signal strength scores used throughout this report reflect screener intersection counts and factor alignment — they are not buy, sell, or hold ratings. See the FAQ and Disclaimer sections.

#1 — Sepong Electric (세명전기, 017510.KQ)

Signal Strength: Maximum | Screener Intersection Count: 6/10

Screener Intersection Summary

Sepong Electric is the only name in the full 459-company universe that simultaneously cleared both the Mean Reversion and PEAD screeners — frameworks built on mutually exclusive assumptions (one requires a price decline; the other requires an earnings-driven price advance). It also cleared Quality Compounder, two Smart Money variants, and Value Quality, for a total intersection of six.

Financial Metrics

Metric	Value
Current Price	₩10,200
52-Week High Discount	−16.9%
Operating Profit YoY	+393%
Net Income YoY	+172%
Forward PER	12.2×
PBR	1.73×
Operating Margin	45.8%
ROE	15.1%
Foreign Ownership Change (20-day)	+1.56 pp, net buy ₩3.1bn
RSI	58.6
MACD	Positive crossover

Thesis

Sepong Electric presents what the screener framework labels a “grand slam reversion” configuration: a meaningful price correction (−16.9% from 52-week high) has reset both sentiment and valuation, while simultaneously the company delivered an operating profit surge of +393% YoY — a magnitude of earnings surprise that typically triggers PEAD drift. The combination creates a dual tailwind: the mean-reversion regime is supported by valuation (PER 12.2×, PBR 1.73×), while the PEAD regime is supported by the earnings acceleration itself. Foreign investors added 1.56 percentage points of ownership over the most recent 20 trading days, a rate of accumulation that is notable for a KOSDAQ small-cap.

Technical Context Observations

Key chart levels observed include MA20 at ₩9,600 and MA60 at ₩9,000. The 52-week high of ₩12,280 sits approximately +20% above the current price of ₩10,200, representing a natural reference level for gauging prior resistance. The MACD has entered a positive crossover phase as of the scan date.

Risk Framing

Sepong Electric is a small-to-mid-cap KOSDAQ security with correspondingly limited daily liquidity. The +393% operating profit surge must be evaluated against cyclical sustainability — whether the profitability improvement represents a structural shift or a one-period spike is a material variable. Single-security concentration risk is elevated relative to KOSPI large-caps.

#2 — Woowon Development (우원개발, 046940.KQ)

Signal Strength: Maximum | Screener Intersection Count: 5/10

Screener Intersection Summary

Woowon Development cleared five screens: PEAD, Quiet Accumulation, and three Smart Money variants. The Quiet Accumulation signal is particularly notable: it is designed to detect institutional accumulation before the market broadly prices it in, using order-flow and positioning analytics rather than price alone.

Financial Metrics

Metric	Value
Current Price	₩5,060
52-Week High Discount	−2.5%
Operating Profit YoY	+2,300%
Net Income YoY	+6,757%
Forward PER	1.9×
PBR	0.58×
ROE	36.8%
Operating Margin	17.9%
Foreign Ownership Change (20-day)	+0.83 pp

Thesis

Woowon Development presents arguably the most extreme valuation anomaly in this week’s scan. A PER of 1.9× combined with ROE of 36.8% is a rare configuration: by the simplest measure of price-to-earnings relative to return on equity, the stock is priced as though its profitability is transient or structurally impaired — yet the most recent period shows operating profit growing +2,300% and net income +6,757% YoY. The Quiet Accumulation signal suggests this divergence between price and fundamentals has not yet been broadly recognized. The PBR of 0.58× means the stock trades below liquidation value of its reported book.

Technical Context Observations

Key chart levels include MA60 at ₩4,400. Scenario reference levels derived from PER-based modeling: a rerating to PER 2.3× implies a price near ₩6,000 (+18% from current); a rerating to PER 2.8× implies approximately ₩7,500 (+48%). These are illustrative scenario levels, not price targets.

Risk Framing

Construction cyclicals are among the highest-beta plays on Korean interest rates and housing market sentiment. A deterioration in domestic credit conditions could rapidly reverse earnings momentum. Liquidity is limited relative to KOSPI mainboard names.

#3 — SK Hynix (SK하이닉스, 000660.KS)

Signal Strength: High | Screener Intersection Count: 5/10

Financial Metrics

Metric	Value
Current Price	₩1,136,000
52-Week Status	New 52-week high
Operating Profit YoY	+101%
Net Income YoY	+117%
Forward PER	5.0×
ROE	44.1%
Institutional Net Buy (10-day)	+₩1.952 trillion
Foreign Net Buy (5-day)	+₩2.547 trillion
Foreign Net (20-day)	−₩2.2 trillion

Thesis

SK Hynix is the globally dominant Korean producer of DRAM and HBM (High Bandwidth Memory), the memory architecture at the core of AI accelerator systems. The screener intersection reflects a convergence of fundamental and flow factors. Foreign investors had been net sellers over the 20-day window (−₩2.2 trillion), but in the most recent 5-day snapshot reversed sharply to +₩2.547 trillion net buying. Simultaneously, domestic institutions maintained consistent accumulation at +₩1.952 trillion over 10 days. This divergence-then-convergence in foreign flows is what the Smart Money screeners are calibrated to detect as a potential regime transition. Forward PER 5.0× against ROE 44.1% is the fundamental anchor.

Technical Context Observations

MA20 sits at ₩960,000, a gap of approximately −15.5% from current price of ₩1,136,000. New 52-week high approaches typically exhibit elevated short-term volatility. A post-breakout consolidation or pullback is a common pattern in such configurations.

Risk Framing

SK Hynix is directly exposed to US-China semiconductor trade restrictions, Korean won/dollar exchange dynamics, and the cyclicality of the global memory industry. Macro deterioration remains the primary systemic risk.

#4 — SK Square (SK스퀘어, 402340.KS)

Signal Strength: High / Mixed-Timing | Screener Intersection Count: 7/10

Financial Metrics

Metric	Value
Current Price	₩690,000
52-Week Status	New 52-week high
Forward PER	4.0×
PBR	3.17×
Operating Profit YoY	+124%
ROE	37.8%
Operating Margin	84.1%
Foreign Net (20-day)	−₩223.6bn (profit-taking)
Institutional Net (20-day)	+₩130.8bn
RSI	66.6

Thesis

SK Square achieved the highest intersection count of this week’s scan at 7/10 screeners — clearing across all major regime categories. SK Square is a holding company whose primary asset is a substantial equity stake in SK Hynix. The Forward PER of 4.0× represents a structural discount to SK Hynix’s own valuation; as SK Hynix’s earnings power is recognized, the discount at which SK Square trades relative to net asset value should compress. The “Mixed-Timing” qualifier reflects a tension: the highest screener intersection (7/10) co-exists with short-term caution indicators — foreign investors are net sellers over 20 days (−₩223.6bn), RSI is elevated at 66.6, and the stock is at a 52-week high.

Technical Context Observations

Key chart levels include MA20 at ₩620,000 and MA60 at ₩550,000. A potential re-entry reference would be a reversal in the 20-day foreign flow trend, which currently shows net selling. Bollinger Band upper boundary proximity is noted.

Risk Framing

Holding company discounts in Korea are structurally persistent. SK Square’s valuation is a derivative of SK Hynix performance, carrying all of SK Hynix’s macro risks with an additional layer of holding-company structure risk.

#5 — Pharmicell (파미셀, 005690.KS)

Signal Strength: High (Flow-Driven) | Screener Intersection Count: 4/10

Financial Metrics

Metric	Value
Current Price	₩17,900
High Discount	−7.1%
Operating Profit YoY	+630%
Net Income YoY	+540%
ROE	38.3%
Operating Margin	30.1%
PER	26.7×
PBR	8.67×
Foreign Net (20-day)	+₩19.5bn, +2.69 pp ownership
Institutional Net (20-day)	+₩11.3bn

Thesis

Pharmicell is a Korean biopharmaceutical company focused on cell therapy. Its dual institutional accumulation — foreign investors adding +₩19.5bn and +2.69 percentage points of ownership while domestic institutions simultaneously add +₩11.3bn over 20 days — represents the strongest fund-flow configuration of the entire scan. This kind of dual-direction institutional convergence is precisely what the Smart Money screeners are calibrated to detect. OP +630% and NI +540% YoY provide fundamental underpinning; ROE 38.3% partially offsets the PBR 8.67× valuation premium.

Technical Context Observations

MA60 at ₩15,500. Bollinger Band upper boundary at approximately ₩18,015; current price at ₩17,900 = 97% of band width. 52-week high is ₩19,270 (+7–8% from current). Scenario reference level ₩22,000 (+23%) would represent a Bollinger expansion breakout scenario if the band widens.

Risk Framing

Biotech names carry binary event risk tied to clinical milestones, regulatory approvals, and pipeline news. PBR 8.67× leaves limited valuation buffer if earnings are revised downward.

Illustrative Regime-Diversification Matrix

Rank	Name (Ticker)	Screener Count	Primary Regime	Forward PER	Foreign Flow (20d)
1	Sepong Electric (017510)	6	Mean Reversion + PEAD	12.2×	+1.56 pp
2	Woowon Development (046940)	5	Quiet Accumulation + Deep Value	1.9×	+0.83 pp
3	SK Hynix (000660)	5	Breakout Momentum	5.0×	+₩2.55tr (5d reversal)
4	SK Square (402340)	7	All-Regime (Holding Re-rating)	4.0×	−₩223.6bn
5	Pharmicell (005690)	4	Smart Money Flow	26.7×	+2.69 pp

Notable Exclusions

Excluded	Primary Reason
Ubiqus (264450)	Foreign ownership −2.08 pp over 20 days — adverse fund flow
Microcontact Sol (098120)	+100.8% over 60 days + RSI 67.6 + Bollinger upper breach = overheated
April (278470)	PBR 34× — premium too extreme despite strong fundamentals
Company K (307930)	ROE 9.2% + foreign ownership 1.36% — quality and liquidity below threshold

FAQ

Q1: What is intersection screening? Intersection screening is a quantitative methodology that identifies securities simultaneously in the top-ranked cohort of multiple independent screens. Rather than selecting stocks that pass any single filter, it requires passage of several filters designed under different assumptions. The overlap is treated as higher-confidence evidence of multi-factor alignment.

Q2: Why run 10 screeners rather than one comprehensive model? A single composite model can mask factor cancellation — a high score on one factor might compensate for a low score on another. Running 10 separate models that each optimize for a distinct regime forces the stock to demonstrate independent strength across multiple dimensions. The intersection is a form of ensemble validation.

Q3: What does PEAD mean? PEAD stands for Post-Earnings Announcement Drift. It is a documented market anomaly — identified in academic literature (Ball & Brown, 1968; Bernard & Thomas, 1989) — in which stock prices continue to drift in the direction of an earnings surprise for weeks or months after the announcement date, rather than adjusting fully on announcement. A PEAD screen identifies stocks that recently reported an earnings surprise and whose price has not yet fully incorporated the information.

Q4: How do you validate that screener intersections are structural signals rather than coincidental factor overlap? This is the central methodological question. Our current validation approach: (a) check factor correlation among intersecting screeners to ensure they are not measuring identical variables (QC, VQ, and SM-Q all share ROE sensitivity — users should treat those three as a partial cluster, not three fully independent votes); (b) examine out-of-sample hit rates for prior intersection cohorts; (c) analyze 12-month forward return distributions for intersection sizes of 4+, 5+, 6+, and 7+. A full backtest on the MR+PEAD simultaneous configuration (as seen in Sepong Electric this week) is planned.

Q5: Is this investment advice? No — educational analysis only. This report does not constitute investment advice, a solicitation to buy or sell any security, or a recommendation to take any financial action. All signal strength scores, scenario reference levels, and technical observations are descriptive and informational in nature.

Conclusion: Why Intersection Is the Meaningful Unit of Analysis

Single-screen investing carries a specific failure mode: every screen has a false positive rate, and in a universe of hundreds of names, even a 5% false positive rate generates dozens of misleading candidates. The solution is not to build a better single screen — it is to require that a candidate survive multiple independent stress tests simultaneously.

When Sepong Electric clears both a mean-reversion screen (requiring a price decline) and a PEAD screen (requiring earnings-surprise momentum), it is not a coincidence. It means the stock passed a filter expecting price weakness and a filter expecting price strength simultaneously — because it offers both: a reset valuation and an accelerating earnings base. That is a more durable thesis than either signal alone.

The five names profiled this week span five distinct investment regimes with low mutual correlation. This diversification is itself a product of the methodology: when you screen for multi-factor validation across regime-diverse screens, you naturally surface a regime-diverse output set. The open questions — whether intersecting screens are truly independent, and how intersection count correlates with forward returns in Korean market conditions — remain items for ongoing backtesting, and we flag them explicitly as open agenda items alongside every weekly publication.

Disclaimer

This report is produced for educational and informational purposes only. It does not constitute investment advice, a solicitation, an offer to buy or sell any security, or a recommendation to take any financial action. The information herein is based on publicly available data and quantitative screener outputs; it may contain errors or omissions, and no representation is made as to its accuracy or completeness.

Individual investors should conduct their own independent research and consult qualified financial advisors before making any investment decision. Every investor’s risk profile, portfolio context, tax situation, investment horizon, and regulatory environment is different.

Liquidity risk notice: Sepong Electric (017510.KQ) and Woowon Development (046940.KQ) are small-to-mid-cap KOSDAQ securities with materially lower daily trading liquidity than KOSPI mainboard large-caps. Investors in illiquid securities face wider bid-ask spreads, greater price impact from position changes, and potentially impaired ability to exit at desired prices.

Past screener performance and historical factor returns do not guarantee future results. Korean equity markets are subject to regulatory, currency, geopolitical, and macroeconomic risks that may not be fully captured by any quantitative framework.

Published: April 18, 2026 | Coverage period: April 9–16, 2026 | Universe: 459 Korean-listed securities | Screeners: 10

Korean Stocks: 8 Names That Beat 5+ Screeners

Thu, 16 Apr 2026 09:00:00 +0900

Why “Screener Intersection” Is a Different Kind of Signal

Most quantitative screens answer one question at a time: Is this stock cheap? Is momentum turning? Are insiders accumulating? The answers are useful in isolation, but individually noisy. A stock can look cheap because it is genuinely overlooked — or because earnings are about to collapse. A momentum breakout can reflect real fundamental improvement or a one-day squeeze with no follow-through.

The intersection approach flips the logic. Instead of asking whether a stock passes a filter, it asks how many independent filters — each designed around a different market regime and a different underlying assumption — return the same name. A stock that surfaces in a mean-reversion model, a post-earnings-drift model, a quality-compounder model, and a quiet-accumulation model at the same time is not just cheap, or just revising, or just being accumulated. It is all of those things simultaneously. That convergence across uncorrelated frameworks is harder to explain away.

This report covers the week of April 9–16, 2026. We ran 10 independent screeners across 459 unique Korean-listed names over up to three daily snapshots each, totaling over 1,300 data points. The 15 names in the leaderboard below appeared in the most screeners with the highest combined hit counts. The top 5 are analyzed in depth.

The Ten Screeners at a Glance

Screener	What It Targets
Mean Reversion (MR)	Deep-corrected stocks showing early reversal conditions
PEAD	Price momentum following a positive earnings surprise
Quality Compounder (QC)	Stocks combining strong ROE, ROIC, and earnings growth
Quiet Accumulation (QA)	Gradual institutional or foreign buying with below-average volume
Smart Money — Earnings (SM-E)	Flow signal anchored to earnings quality
Smart Money — Volatility (SM-V)	Flow signal anchored to risk-adjusted returns
Smart Money — Quality (SM-Q)	Flow signal anchored to balance sheet quality
Value Quality (VQ)	Low-valuation stocks that also clear a quality hurdle
Cycle	Stocks at or near cyclical inflection from trough to expansion

All ten screeners ran without errors for the review period. The Smart Money files timestamped April 13 (16:08:44, 16:08:55, and 06:06) used a slightly different naming convention but produced valid output. The Mean Reversion snapshot updated live in the early hours of April 16, completing the dataset.

Cross-Screener Leaderboard — Top 15 (Week of Apr 16, 2026)

Rank	Ticker	Name	Screeners	Total Hits	Combination
1	402340	SK Square	7	18	Cycle + PEAD + QC + SM×3 + VQ
2	264450	Ubiqus	6	11	Cycle + PEAD + SM×3 + VQ
3	017510	Semyung Electric	6	6	MR + PEAD + QC + SM×2 + VQ
4	000660	SK Hynix	5	13	Cycle + PEAD + QC + SM×2
5	098120	Microcontact Solutions	5	11	PEAD + QC + QA + SM×2
6	307930	Company K	5	9	Cycle + PEAD + QC + SM×2
7	046940	Woowon Development	5	9	PEAD + QA + SM×3
8	330730	Stonebridge Ventures	5	7	PEAD + QA + SM×3
9	005690	Pharmicell	4	9	PEAD + QC + SM×2
10	278470	APR	4	9	PEAD + QC + SM×2
11	078070	Ubiqus Holdings	4	8	Cycle + PEAD + SM×2
12	021080	Atinum Investment	4	8	MR + PEAD + SM×2
13	101490	S&S Tech	4	6	PEAD + QC + SM×2
14	005440	Hyundai GF Holdings	4	4	Cycle + QA + SM + VQ
15	425420	TFE	3	8	PEAD + QC + SM

MR = Mean Reversion · QA = Quiet Accumulation · QC = Quality Compounder · VQ = Value Quality · SM = Smart Money variant

Top 5 Deep Dives

1. SK Square (KOSPI: 402340) — 7 Screeners, 18 Hits

SK Square is the listed investment holding company spun out of SK Telecom in 2021. Its primary asset is a roughly 20% stake in SK Hynix, making its financials unusually sensitive to semiconductor cycles.

Fundamentals (FY2025, consolidated):

Metric	Value
Revenue	₩10.5 trillion
Operating Profit	₩8.8 trillion
Net Income	₩8.8 trillion
Revenue YoY	+77.8%
Operating Profit YoY	+124%
Net Income YoY	+142%
ROE	37.8%
Operating Margin	84.1%
Trailing PER	10.0×
Forward PER	4.0×
PBR	3.17×
VQ Score	0.79
Quality Score	0.96
Cycle Score	0.96

The 84% operating margin reflects the holding-company structure: most reported profit is mark-to-market or dividend income from subsidiaries rather than operational cash flow. The forward PER of 4.0× against a Quality Score of 0.96 is the combination that triggered six additional screeners beyond Cycle.

Price action: At ₩690,000, the stock is at a 52-week high, up +54.5% over 60 days. RSI stands at 66.6 and price has broken above the upper Bollinger Band (at 103% of the band). These are early-stage overheating conditions.

Flow breakdown:

5-day foreign net buy: +₩1.4 billion; institutional net buy: +₩181.5 billion
20-day foreign net buy: −₩223.6 billion (profit-taking); institutional net buy: +₩130.8 billion (offsetting)
Foreign ownership change: −0.26 percentage points over 20 days

The divergence is notable: institutions are accumulating aggressively while foreigners who entered earlier are trimming. This is a rotation pattern, not a clean accumulation setup. The 7-screener score is the strongest in the dataset, but the near-term technical picture suggests a 1–2 week consolidation is more likely than immediate continuation.

2. Semyung Electric (KOSPI: 017510) — 6 Screeners, MR + PEAD Dual Signal

Semyung Electric manufactures distribution transformers and power grid equipment. It is a direct beneficiary of Korea’s grid modernization investment cycle and the broader global power-infrastructure buildout driven by data-center electricity demand.

Fundamentals (FY2025):

Metric	Value
Revenue YoY	+124%
Operating Profit YoY	+393%
Operating Margin	45.8%
ROE	15.1%
Trailing PER	12.2×
PBR	1.73×

An operating margin of 45.8% in a manufacturing business is unusually high and suggests significant operating leverage materializing as revenue scales rapidly. A PER of 12.2× against +393% operating profit growth implies the market has not yet priced the earnings step-change.

Technical setup:

Price: ₩10,200 — trading above the 5-day, 20-day, and 60-day moving averages
Distance from 52-week high: −16.9% (deep correction completed)
RSI: 58.6 (neutral-to-recovering)
MACD: positive crossover (early-stage reversal confirmation)
Price has touched the upper Bollinger Band: early breakout signal

Flow:

20-day foreign net buy: +₩3.1 billion
Foreign ownership change: +1.56 percentage points over 20 days

This is the only stock in the entire 459-name universe that simultaneously cleared both Mean Reversion (price corrected more than 16% from peak, technical reversal beginning) and PEAD (strong post-earnings drift conditions following the +393% operating profit surprise). The combination is significant: MR signals that the psychological and price reset has been completed, while PEAD signals that the fundamental revision cycle is still early. Foreign investors adding 1.56 percentage points of ownership during the correction adds a third independent confirmation layer.

3. SK Hynix (KOSPI: 000660) — 5 Screeners, 13 Hits

SK Hynix is Korea’s largest memory semiconductor company and the world’s second-largest DRAM producer. It is a primary supplier of High-Bandwidth Memory (HBM) to AI accelerator manufacturers.

Fundamentals (FY2025):

Metric	Value
Revenue YoY	+46.8%
Operating Profit YoY	+101%
ROE	44.1%
Operating Margin	48.6%
Forward PER	5.0×

Price action: At ₩1,136,000, the stock is at a 52-week high, up +51.7% over 60 days.

Flow — the key development this week:

Horizon	Foreign	Institutional
5-day	+₩250 billion	n/a
10-day	+₩290 billion	(continued accumulation)
20-day	−₩2.2 trillion	+₩1.95 trillion

The 20-day foreign figure shows heavy profit-taking, but the 5-day and 10-day data show that foreign investors have reversed to net buying within the past two weeks. Combined with institutional accumulation of nearly ₩2 trillion over 20 days, the flow picture has shifted. Foreign ownership sits at 53.08%.

A Forward PER of 5.0× for a company generating 48.6% operating margins with AI-driven HBM demand continuing to expand is the central investment thesis captured by the Cycle, PEAD, and Quality Compounder screeners.

4. Microcontact Solutions (KOSDAQ: 098120) — 5 Screeners including Quiet Accumulation

Microcontact Solutions manufactures semiconductor test contactors (socket hardware used in IC test handlers). It is a niche supplier in the back-end semiconductor equipment chain.

Fundamentals (FY2025):

Metric	Value
Revenue YoY	+44%
Operating Profit YoY	+73%
Net Income YoY	+59%
ROE	23.1%
Operating Margin	17.7%
Trailing PER	17.0×
PBR	3.54×

Price action: ₩34,150 — within 1.3% of the 52-week high, up +100.8% over 60 days. RSI at 67.6 and Bollinger Band position at 102% indicate the stock is in overheating territory.

Flow: 20-day foreign net buy +₩3.7 billion; foreign ownership +1.47 percentage points — consistent, below-radar accumulation across the period.

The interest here is methodological: it is unusual for a stock to clear Quiet Accumulation (steady buying, low volume spikes), PEAD (strong post-earnings drift), Smart Money Earnings and Volatility variants, and Quality Compounder in the same week. This means every regime-type the system monitors — contrarian, momentum, fundamental, and technical — flagged the same name. The practical constraint is the 60-day return of +100.8%, which substantially raises the risk of entering at current prices.

5. Woowon Development (KOSPI: 046940) — 5 Screeners, Extreme Turnaround

Woowon Development is a Korean civil engineering and construction company focused on infrastructure and residential projects.

Fundamentals (FY2025):

Metric	Value
Revenue YoY	+24%
Operating Profit YoY	+2,300%
Net Income YoY	+6,757%
ROE	36.8%
Operating Margin	17.9%
Debt Ratio	68.5%
Trailing PER	1.9×
PBR	0.58×

Price: ₩5,060, within 2.5% of 52-week high. RSI at 61.0, MACD positive.

Flow: Foreign ownership at 9.37%, with +0.83 percentage points added over 20 days.

The operating profit expanding 23-fold and net income expanding 68-fold on a 24% revenue increase implies the company passed a profitability inflection point — likely the resolution of project cost overruns or completion of low-margin legacy contracts. At PER 1.9× and PBR 0.58×, the valuation has not yet adjusted. The Quiet Accumulation flag suggests this re-rating is happening slowly and below institutional radar. The construction sector is inherently cyclical and carries execution risk, which explains the depressed multiples even after the earnings surge.

Investment Implications: Why Intersection Screening Matters

The aggregate signal from this week’s data points to three structural themes in Korean equities:

1. Power infrastructure is re-rating. Semyung Electric’s appearance across six screeners — including the rare MR+PEAD dual signal — reflects a broader market recognition that Korea’s grid equipment manufacturers are operating in a multi-year demand upcycle driven by AI data center power requirements and government grid modernization mandates.

2. The semiconductor cycle has entered institutional accumulation mode. Both SK Hynix and SK Square cleared multiple screeners, and institutional flow data shows sustained buying measured in the hundreds of billions to trillions of won. The Forward PER profiles (5× for Hynix, 4× for SK Square) suggest the market is pricing a earnings peak scenario that the underlying AI infrastructure demand trajectory may not support.

3. Micro-cap turnarounds with foreign accumulation are the highest-dispersion opportunity. Woowon Development (PER 1.9×, PBR 0.58×, OP +2,300%) and Semyung Electric (PER 12.2×, OP +393%) represent situations where the valuation has not yet caught up with an earnings step-change that has already occurred. Foreign investors quietly adding ownership in both names — before a re-rating — is historically the pattern that precedes meaningful price discovery.

A methodological caution: QC, VQ, and SM-Quality all weight ROE heavily. Stocks like SK Square that appear in all three may be generating three “independent” flags that actually reflect the same underlying factor. Genuine independence requires regime diversity — the MR+PEAD combination in Semyung Electric, or the QA+PEAD+SM combination in Woowon Development, are structurally more independent because they draw from different data sources (price history, earnings revisions, ownership changes).

Bull and Bear Considerations by Name

Ticker	Bull Case	Bear Case
017510 Semyung Electric	Grid capex super-cycle sustains 40%+ margins; PER expands to 20–25× on visibility	Project concentration risk; margin normalization as competition enters
046940 Woowon Development	PER/PBR normalization alone implies 3–5× upside; foreign accumulation accelerating	Construction cycle turns; high debt ratio amplifies downside; earnings quality uncertain
000660 SK Hynix	HBM pricing power + AI server buildout sustains HBM3E/HBM4 margin premium	DRAM commodity oversupply returns; US export controls tighten on advanced memory
402340 SK Square	Holding discount narrows; SK Hynix re-rating flows through; buybacks	Holding discount widens; Hynix correction disproportionately hurts NAV
098120 Microcontact	Backend semiconductor intensity rises with AI chip complexity; niche pricing power	60-day +100% has pulled forward much of the re-rating; customer concentration

FAQ

What is Mean Reversion screening in the context of Korean stocks? Mean Reversion (MR) screening identifies stocks that have declined significantly from recent peaks — typically 15–25% — and show early technical signs of stabilization or reversal. The logic is that short-term price moves often overshoot fair value, creating asymmetric entry opportunities. In this week’s scan, Semyung Electric’s −16.9% drawdown from its 52-week high, combined with MACD turning positive and price recovering above key moving averages, met the MR criteria.

Why run 10 screeners instead of one comprehensive model? Different market regimes reward different factor combinations. A single model optimized for mean reversion will systematically miss earnings-momentum opportunities, and vice versa. Running 10 independent models — each designed for a specific regime — and then finding names that appear across multiple models reduces the probability that any single name’s appearance is a false positive driven by data quirks or factor-specific noise. The intersection acts as a natural filter.

What does “Quiet Accumulation” mean, and why is it significant? Quiet Accumulation (QA) flags stocks where foreign or institutional ownership is rising steadily but total trading volume remains below average — suggesting informed buyers are building positions without moving the price. It is significant because it implies the re-rating has not yet been publicly recognized or broadly discussed, which historically precedes price discovery phases. Woowon Development, Microcontact Solutions, and Stonebridge Ventures all cleared QA this week.

How should international investors interpret Korean ownership data? Korean exchanges (KOSPI and KOSDAQ) require daily disclosure of foreign and institutional ownership changes. “Foreign” typically means non-Korean investors including global funds, hedge funds, and asset managers. “Institutional” means domestic Korean funds, insurance companies, and brokerages. When both are accumulating simultaneously — as with SK Hynix over 5–10 days — it suggests broad conviction across investor types. When they diverge — as with SK Square, where foreigners are selling and institutions are buying — it signals a rotation between investor groups rather than net new demand.

What is PEAD, and how is it applied here? Post-Earnings Announcement Drift (PEAD) is a well-documented market anomaly: stocks that report earnings significantly above consensus tend to continue drifting upward for weeks to months following the announcement, as the full magnitude of the earnings surprise is gradually absorbed by the market. The PEAD screener identifies stocks where this drift condition is active — typically within 30–60 days of a large positive earnings revision. Of the 459 names scanned, PEAD appeared in the screener combinations of 11 of the top 15.

Disclaimer

This report is produced for informational and educational purposes only. It does not constitute investment advice, a solicitation to buy or sell any security, or a recommendation of any specific investment strategy. All data referenced — including financial metrics, price levels, ownership percentages, and screener scores — reflects the analysis period of April 9–16, 2026, and may have changed materially since publication. Korean-listed equities involve market, currency, liquidity, and regulatory risks that may differ significantly from investors’ home markets. Past screener performance and historical data patterns do not guarantee future results. Readers should conduct their own due diligence and consult a licensed financial advisor before making any investment decisions. The author and publisher hold no positions in the securities discussed at the time of publication.