Screen stocks

Skill erhwenkuo/stock_skills/.claude/skills/screen-stocks

An undervalued stock screening system. Screens for undervalued stocks across 60+ regions using the Yahoo Finance API (yfinance). Runs as Claude Code Skills — just speak in natural language and the right function executes automatically.

Install

npx -y skills add erhwenkuo/stock_skills --skill screen-stocks

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

2 things to look at

no licenseNo license file was found in the repository. Code published without one is not open source by default, so using it at work is a question for whoever answers licensing questions where you are.
3 stars3 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.

What its author says it does

Copied from the file, not written here

Undervalued stock screening. EquityQuery-based screening without a predefined stock list. Searches for undervalued stocks across 60+ regions including Japan, US, ASEAN, Hong Kong, Korea, and Taiwan using P/E, P/B, dividend yield, ROE, and more.

SKILL.md

14.1 KB, as published. Nobody here has run it

Undervalued Stock Screening Skill

Parse $ARGUMENTS to determine region, preset, and sector, then run the following command.

Execution Command

python3 /Users/kikuchihiroyuki/stock-skills/.claude/skills/screen-stocks/scripts/run_screen.py --region <region> --preset <preset> [--sector <sector>] [--theme <theme>] [--top <N>] [--mode <query|legacy>]

Natural Language Routing

For natural language → skill selection, see .claude/rules/intent-routing.md.

Available Region Codes (yfinance EquityQuery)

Major regions: jp, us, sg, th, my, id, ph, hk, kr, tw, cn, gb, de, fr, in, au, br, ca, etc. (~60 regions)

Available Exchange Codes

Exchange	Code
Tokyo Stock Exchange	JPX
NASDAQ	NMS
NYSE	NYQ
Singapore Exchange	SES
Stock Exchange of Thailand	SET
Bursa Malaysia	KLS
Indonesia Stock Exchange	JKT
Philippine Stock Exchange	PHS
Hong Kong Stock Exchange	HKG
Korea Stock Exchange	KSC/KOE
Taiwan Stock Exchange	TAI

Theme Screening (KIK-439)

Use --theme <theme> in combination with any preset to narrow screening to a specific theme. trending/pullback/alpha presets do not support --theme.

Theme Key	Description	Target Industries (excerpt)
`ai`	AI & Semiconductors	Semiconductors, Software—Infrastructure, Electronic Components
`ev`	EV & Next-Gen Vehicles	Auto Manufacturers, Electrical Equipment & Parts
`cloud-saas`	Cloud & SaaS	Software—Application, Software—Infrastructure
`cybersecurity`	Cybersecurity	Software—Infrastructure (security-focused)
`biotech`	Biotech & Drug Development	Biotechnology, Drug Manufacturers
`renewable-energy`	Renewable Energy	Solar, Utilities—Renewable
`fintech`	Fintech	Software—Application (finance-focused), Capital Markets
`defense`	Defense & Aerospace	Aerospace & Defense
`healthcare`	Healthcare & Medical Devices	Medical Devices, Health Information Services

Theme definitions are managed in config/themes.yaml.

Trend Theme Auto-Detection (KIK-440)

Use --auto-theme to automatically detect trending themes via the Grok API (X/Web search) and run screening for each theme sequentially.

Pipeline

Grok API detects 3–5 trending themes from X/Web (with confidence scores)
Cross-reference with keys in themes.yaml; only supported themes are executed (unsupported themes show a skip notice)
Run the specified preset screening for each theme

Constraints

--auto-theme and --theme are mutually exclusive
Cannot be combined with trending/pullback/alpha presets
XAI_API_KEY required (exits with error if not set)

Difference from `trending` Preset

	`--preset trending`	`--auto-theme`
Detection target	Trending individual stocks on X	Trending themes / sectors
Granularity	Stock-level	Theme-level
Screening	Fundamental evaluation	Any preset within each theme

Execution Examples

# Screen for undervalued stocks in Japanese trending themes
python3 .../run_screen.py --region japan --preset value --auto-theme

# High-growth stocks in US trending themes
python3 .../run_screen.py --region us --preset high-growth --auto-theme

# Global trending themes with default preset
python3 .../run_screen.py --preset value --auto-theme

Screening Modes

--mode query (default): EquityQuery mode. Uses yfinance's EquityQuery API to search for qualifying stocks directly without a predefined list. Works across all regions. Fast.
--mode legacy: Stock list mode. Uses the legacy ValueScreener. Fetches and evaluates stocks from a predefined list (Nikkei 225, S&P 500, etc.) one by one. Japan/US/ASEAN only.
--with-pullback: Add pullback filter. Applies technical pullback detection on top of any preset (value, high-dividend, etc.). No need to combine with --preset pullback (pullback preset takes priority). Output uses the same column format as Pullback mode.

Presets

value: Traditional value investing (low P/E, low P/B, ROE ≥ 5%)
high-dividend: High-dividend stocks (dividend yield ≥ 3%)
growth: Pure growth stocks (high ROE ≥ 15%, revenue growth ≥ 10%; no P/E constraint; selected by growth strength regardless of valuation)
growth-value: Growth-value blend (growth potential + undervaluation)
deep-value: Deep value (very low P/E and P/B)
quality: Quality value (ROE ≥ 15% + undervaluation; stricter ROE threshold than value at 5% → 15%; limited to highly profitable undervalued stocks)
pullback: Pullback entry (temporary correction during an uptrend; 3-stage pipeline: EquityQuery → technical → SR; takes longer to run)
alpha: Alpha signal (3-axis integration: undervaluation + change quality + pullback; 4-stage pipeline: EquityQuery → change quality → pullback detection → 2-axis scoring; takes longer to run)
trending: X-trending stocks (discover trending stocks on X via Grok API → evaluate fundamentals via Yahoo Finance; --theme filtering available; XAI_API_KEY required)
long-term: Long-term investment suitability (ROE ≥ 15%, EPS growth ≥ 10%, dividend ≥ 2%, P/E ≤ 25, P/B ≤ 3, market cap ≥ ¥100B; searches for stable growth stocks suitable for long-term holding)
shareholder-return: Shareholder return focus (ranked by total return rate: dividend yield + buyback yield; with stability assessment: ✅Stable/📈Increasing/⚠️Temporary/📉Declining)
high-growth: High-growth stocks (profit-agnostic; revenue growth ≥ 20%, recent quarterly revenue growth ≥ 10%, PSR ≤ 20, gross margin ≥ 20%; includes unprofitable growth companies; uses PSR instead of P/E to prevent bubble selection) (KIK-432)
small-cap-growth: Small-cap high-growth (market cap ≤ ¥100B; revenue growth ≥ 20%, PSR ≤ 15, gross margin ≥ 20%; targets 10x candidates undiscovered by institutions; auto-adjusts market cap threshold by region; Risk ★★★★) (KIK-437)
contrarian: Contrarian candidates (technically oversold × valuationally cheap × fundamentally sound; 3-axis 100-point scoring; detects "market overreaction," the opposite of value traps) (KIK-504)
momentum: Momentum surge stocks (4-axis scoring: RSI/MACD/momentum rate/volume surge; detects stocks in uptrends; --submode selects stable acceleration vs. surge) (KIK-506)

Momentum Screening Details (KIK-506)

3-Stage Momentum Classification

Classification	Condition	Description
🟢 Accelerating	Score 40–69	Steady upward momentum; high continuity with no overheating
🟡 Surging	Score 70–89	Rapid price rise; high short-term attention but watch for correction
🔴 Overheated	Score 90–100	Overheated state; high return potential but elevated correction risk

`--submode` Parameter

Use --submode to filter by classification.

Value	Shows	Recommended Use Case
`stable` (default)	🟢 Accelerating only	When you want stable uptrend stocks
`surge`	🟡 Surging + 🔴 Overheated	When you also want short-term surge stocks

4-Axis Scoring

Axis	Max	Condition
RSI strength	25	RSI ≥ 60
MACD cross	25	MACD > signal line (bullish cross)
Momentum rate	25	20-day price change rate exceeds threshold
Volume surge	25	5-day avg volume / 20-day avg volume ≥ 1.3

Total score ≥ 40 qualifies as a momentum stock.

Output

Display results in Markdown table format. EquityQuery mode adds a Sector column.

EquityQuery Mode Columns

Rank / Symbol / Sector / Price / P/E / P/B / Div Yield / ROE / Score

Legacy Mode Columns

Rank / Symbol / Price / P/E / P/B / Div Yield / ROE / Score

Pullback Mode Columns

Rank / Symbol / Price / P/E / Pullback% / RSI / Volume Ratio / SMA50 / SMA200 / Score

Alpha Mode Columns

Rank / Symbol / Price / P/E / P/B / Underval / Change / Total / Pullback / α / Accel / FCF / ROE Trend

Growth Mode Columns

Rank / Symbol / Sector / Price / P/E / P/B / EPS Growth / Revenue Growth / ROE

Trending Mode Columns

Rank / Symbol / Trending Reason / Price / P/E / P/B / Div Yield / ROE / Score / Judgment

Contrarian Mode Columns

Rank / Symbol / Price / P/E / P/B / RSI / SMA200 Dev / Tech / Val / Fund / Total / Judgment

Momentum Mode Columns

Rank / Symbol / Price / P/E / RSI / MACD / Momentum Rate / Volume Ratio / Momentum Score / Total Score / Classification

Shareholder Return Mode Columns

Rank / Symbol / Price / Div Yield / Buyback Yield / Total Return / Stability / ROE / P/E

Execution Examples

# Japanese undervalued stocks (default)
python3 .../run_screen.py --region japan --preset value

# US high-dividend technology stocks
python3 .../run_screen.py --region us --preset high-dividend --sector Technology

# Hong Kong value stocks
python3 .../run_screen.py --region hk --preset value

# ASEAN growth-value stocks (runs sg, th, my, id, ph sequentially)
python3 .../run_screen.py --region asean --preset growth-value

# Legacy mode US screening
python3 .../run_screen.py --region us --preset value --mode legacy

# Japanese pullback candidates
python3 .../run_screen.py --region japan --preset pullback

# Japanese alpha signals (undervaluation + change + pullback)
python3 .../run_screen.py --region japan --preset alpha

# US alpha signals
python3 .../run_screen.py --region us --preset alpha

# Japanese undervalued stocks + pullback filter
python3 .../run_screen.py --region japan --preset value --with-pullback

# US high-dividend stocks + pullback filter
python3 .../run_screen.py --region us --preset high-dividend --with-pullback

# Trending Japanese stocks on X (Twitter)
python3 .../run_screen.py --region japan --preset trending

# Trending AI-related US stocks on X
python3 .../run_screen.py --region us --preset trending --theme "AI"

# Trending semiconductor-related stocks on X
python3 .../run_screen.py --region japan --preset trending --theme "semiconductors"

# Japanese long-term investment candidates
python3 .../run_screen.py --region japan --preset long-term

# US long-term investment candidates
python3 .../run_screen.py --region us --preset long-term

# Japanese pure growth stocks (no valuation constraint)
python3 .../run_screen.py --region japan --preset growth

# US pure growth stocks
python3 .../run_screen.py --region us --preset growth

# Japanese high-return stocks
python3 .../run_screen.py --region japan --preset shareholder-return

# US high-return stocks
python3 .../run_screen.py --region us --preset shareholder-return

# US high-growth stocks (profit-agnostic, PSR-based)
python3 .../run_screen.py --region us --preset high-growth

# Japanese high-growth stocks
python3 .../run_screen.py --region japan --preset high-growth

# AI-related undervalued stocks (US)
python3 .../run_screen.py --region us --preset value --theme ai

# Semiconductor high-growth stocks (US)
python3 .../run_screen.py --region us --preset high-growth --theme ai

# Defense-related stocks (US, undervalued)
python3 .../run_screen.py --region us --preset value --theme defense

# EV-related growth stocks (US)
python3 .../run_screen.py --region us --preset growth --theme ev

# Biotech high-growth stocks
python3 .../run_screen.py --region us --preset high-growth --theme biotech

# Japanese small-cap high-growth stocks (market cap ≤ ¥100B)
python3 .../run_screen.py --region japan --preset small-cap-growth

# US small-cap high-growth stocks (auto-adjusted to ≤ $1B)
python3 .../run_screen.py --region us --preset small-cap-growth

# AI-related small-cap growth stocks
python3 .../run_screen.py --region us --preset small-cap-growth --theme ai

# Japanese contrarian candidates (oversold × fundamentally sound)
python3 .../run_screen.py --region japan --preset contrarian

# US contrarian candidates
python3 .../run_screen.py --region us --preset contrarian

# Technology sector contrarian candidates
python3 .../run_screen.py --region japan --preset contrarian --sector Technology

# Japanese momentum stocks (stable acceleration only, default)
python3 .claude/skills/screen-stocks/scripts/run_screen.py --preset momentum --region japan --top 10

# US momentum screening including surge stocks
python3 .claude/skills/screen-stocks/scripts/run_screen.py --preset momentum --region us --top 5 --submode surge

# Technology sector momentum stocks
python3 .../run_screen.py --region japan --preset momentum --sector Technology

Annotation Features (KIK-418/419)

Screening results are automatically annotated with markers based on investment notes and trade history.

Marker Legend

Marker	Meaning	Trigger
⚠️	Has concern note	Investment note type=concern
📝	Has lesson note	Investment note type=lesson
👀	On watch	Investment note type=observation + keywords like "pass", "waiting"

Auto-Exclusion of Sold Stocks

Stocks sold within the last 90 days are automatically excluded from screening results. The exclusion count is shown in a message.

Data Sources

Neo4j knowledge graph (preferred)
JSON files (fallback when Neo4j is not connected)

Knowledge Integration Rules (KIK-466)

When get_context.py output contains the following, integrate with screening results:

Recurring stocks (SURFACED 3+ times): "Top 3 consecutive screenings → consistently rated undervalued; detailed report recommended"
Held stocks: If screening results include held stocks, "Currently held: consider as additional investment material"
Concern notes: If a result stock has a concern note, append "⚠️ Has concern note"
Sold stocks: If a previously sold stock reappears at the top, "Previously sold → consider re-entry"

2 things to look at

What its author says it does

SKILL.md

Undervalued Stock Screening Skill

Execution Command

Natural Language Routing

Available Region Codes (yfinance EquityQuery)

Available Exchange Codes

Theme Screening (KIK-439)

Trend Theme Auto-Detection (KIK-440)

Pipeline

Constraints

Difference from trending Preset

Execution Examples

Screening Modes

Presets

Momentum Screening Details (KIK-506)

3-Stage Momentum Classification

--submode Parameter

4-Axis Scoring

Output

EquityQuery Mode Columns

Legacy Mode Columns

Pullback Mode Columns

Alpha Mode Columns

Growth Mode Columns

Trending Mode Columns

Contrarian Mode Columns

Momentum Mode Columns

Shareholder Return Mode Columns

Execution Examples

Annotation Features (KIK-418/419)

Marker Legend

Auto-Exclusion of Sold Stocks

Data Sources

Knowledge Integration Rules (KIK-466)

Keep looking

Difference from `trending` Preset

`--submode` Parameter