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gracefullight avatar

Stock Analysis

gracefullight/stock-checker

A comprehensive stock and crypto analysis tool that pulls real Yahoo Finance data and runs eight weighted checks including earnings surprises, analyst sentiment, and market context. Creates and tracks portfolios with P&L calculations, detects pre-earnings timing risks, and flags geopolitical events that might hurt specific sectors. The breaking news scanner caught me off guard during the last Fed meeting when it correctly flagged banking stress before I noticed it myself. Outputs either clean buy/hold/sell recommendations or structured JSON for further analysis. Portfolio data saves to ~/.clawdbot/skills/stock-analysis/portfolios.json and the crypto support covers the top 20 by market cap with BTC correlation metrics.

installs
12.1K
GitHub stars
49
last updated
Aug 21, 2026
View on GitHubSave

Install

$ npx -y skills add gracefullight/stock-checker --skill stock-analysis --agent claude-code

Installs into .claude/skills of the current project.

Files

Stock Analysis (v5.0)

Analyze US stocks and cryptocurrencies using Yahoo Finance data. Includes portfolio management, crypto support, and periodic analysis.

Quick Start

IMPORTANT: Pass ONLY the stock ticker symbol(s) as arguments. Do NOT add extra text, headers, or formatting in the command.

Analyze a single ticker:

uv run {baseDir}/scripts/analyze_stock.py AAPL
uv run {baseDir}/scripts/analyze_stock.py MSFT --output json

Compare multiple tickers:

uv run {baseDir}/scripts/analyze_stock.py AAPL MSFT GOOGL

Cryptocurrency Analysis (v5.0)

Analyze top 20 cryptocurrencies by market cap:

uv run {baseDir}/scripts/analyze_stock.py BTC-USD
uv run {baseDir}/scripts/analyze_stock.py ETH-USD SOL-USD

Supported Cryptos: BTC-USD, ETH-USD, BNB-USD, SOL-USD, XRP-USD, ADA-USD, DOGE-USD, AVAX-USD, DOT-USD, MATIC-USD, LINK-USD, ATOM-USD, UNI-USD, LTC-USD, BCH-USD, XLM-USD, ALGO-USD, VET-USD, FIL-USD, NEAR-USD

Crypto Analysis Dimensions:

  • Market cap (large/mid/small classification)
  • Category (Smart Contract L1, DeFi, Payment, etc.)
  • BTC correlation (30-day)
  • Momentum (RSI, price range)
  • Market context (VIX, general market regime)

Portfolio Management (v5.0)

Create and manage portfolios with mixed assets (stocks + crypto):

# Create portfolio
uv run {baseDir}/scripts/portfolio.py create "My Portfolio"

# Add assets
uv run {baseDir}/scripts/portfolio.py add AAPL --quantity 100 --cost 150.00
uv run {baseDir}/scripts/portfolio.py add BTC-USD --quantity 0.5 --cost 40000 --portfolio "My Portfolio"

# View holdings with current P&L
uv run {baseDir}/scripts/portfolio.py show

# Update/remove assets
uv run {baseDir}/scripts/portfolio.py update AAPL --quantity 150
uv run {baseDir}/scripts/portfolio.py remove BTC-USD

# List/delete portfolios
uv run {baseDir}/scripts/portfolio.py list
uv run {baseDir}/scripts/portfolio.py delete "My Portfolio"

Portfolio Storage: ~/.clawdbot/skills/stock-analysis/portfolios.json

Portfolio Analysis (v5.0)

Analyze all assets in a portfolio with optional period returns:

# Analyze portfolio
uv run {baseDir}/scripts/analyze_stock.py --portfolio "My Portfolio"

# With period returns (daily/weekly/monthly/quarterly/yearly)
uv run {baseDir}/scripts/analyze_stock.py --portfolio "My Portfolio" --period weekly
uv run {baseDir}/scripts/analyze_stock.py -p "My Portfolio" --period monthly

Portfolio Summary includes:

  • Total cost, current value, P&L
  • Period return (if specified)
  • Concentration warnings (>30% in single asset)
  • Recommendation summary (BUY/HOLD/SELL counts)

Examples:

  • ✅ CORRECT: uv run {baseDir}/scripts/analyze_stock.py BAC
  • ✅ CORRECT: uv run {baseDir}/scripts/analyze_stock.py BTC-USD
  • ❌ WRONG: uv run {baseDir}/scripts/analyze_stock.py === BANK OF AMERICA (BAC) - Q4 2025 EARNINGS ===
  • ❌ WRONG: uv run {baseDir}/scripts/analyze_stock.py "Bank of America"

Use the ticker symbol only (e.g., BAC, not "Bank of America"). For crypto, use the -USD suffix (e.g., BTC-USD).

Analysis Components

The script evaluates eight key dimensions:

  1. Earnings Surprise (30% weight): Actual vs expected EPS, revenue beats/misses
  2. Fundamentals (20% weight): P/E ratio, profit margins, revenue growth, debt levels
  3. Analyst Sentiment (20% weight): Consensus ratings, price target vs current price
  4. Historical Patterns (10% weight): Past earnings reactions, volatility
  5. Market Context (10% weight): VIX, SPY/QQQ trends, market regime
  6. Sector Performance (15% weight): Stock vs sector comparison, sector trends
  7. Momentum (15% weight): RSI, 52-week range, volume, relative strength
  8. Sentiment Analysis (10% weight): Fear/Greed Index, short interest, VIX term structure, insider trading, put/call ratio

Sentiment Sub-Indicators:

  • Fear & Greed Index (CNN): Contrarian signal (extreme fear = buy opportunity, extreme greed = caution)
  • Short Interest: High shorts + squeeze potential = bullish; justified shorts = bearish
  • VIX Term Structure: Contango = complacency/bullish; backwardation = stress/bearish
  • Insider Activity: Net buying/selling from SEC Form 4 filings (90-day window)
  • Put/Call Ratio: High ratio = excessive fear/bullish; low ratio = complacency/bearish

Weights auto-normalize if some components unavailable.

Special Timing Checks:

  • Pre-earnings warning (< 14 days): Recommends HOLD instead of BUY
  • Post-earnings spike detection (> 15% in 5 days): Flags "gains priced in"
  • Overbought conditions (RSI > 70 + near 52w high): Reduces confidence

Timing Warnings & Risk Flags

The script detects high-risk scenarios:

Earnings Timing

  • Pre-Earnings Period: If earnings < 14 days away, BUY signals become HOLD
  • Post-Earnings Spike: If stock up > 15% in 5 days after earnings, warns "gains may be priced in"

Technical Risk

  • Overbought Conditions: RSI > 70 + near 52-week high = high-risk entry

Market Risk

  • High VIX: Market fear (VIX > 30) reduces confidence in BUY signals
  • Risk-Off Mode (v4.0.0): When safe-havens (GLD, TLT, UUP) rise together, reduces BUY confidence by 30%
    • Detects flight to safety across gold, treasuries, and USD
    • Triggers when GLD ≥ +2%, TLT ≥ +1%, UUP ≥ +1% (5-day change)

Sector Risk

  • Sector Weakness: Stock may look good but sector is rotating out

Geopolitical Risk (v4.0.0)

The script now scans breaking news (last 24h) for crisis keywords and automatically flags affected stocks:

  • Taiwan Conflict: Semiconductors (NVDA, AMD, TSM, INTC, etc.) → 30% confidence penalty
  • China Tensions: Tech/Consumer (AAPL, QCOM, NKE, SBUX, etc.) → 30% confidence penalty
  • Russia-Ukraine: Energy/Materials (XOM, CVX, MOS, CF, etc.) → 30% confidence penalty
  • Middle East: Oil/Defense (XOM, LMT, RTX, etc.) → 30% confidence penalty
  • Banking Crisis: Financials (JPM, BAC, WFC, C, etc.) → 30% confidence penalty

If a ticker is not in the affected list but its sector is exposed, applies a 15% confidence penalty.

Example Alert:

⚠️ SECTOR RISK: Tech supply chain and consumer market exposure (detected: china, tariff)

Breaking News Alerts (v4.0.0)

  • Scans Google News RSS for crisis keywords (war, recession, sanctions, disasters, etc.)
  • Displays up to 2 breaking news alerts in caveats (last 24 hours)
  • Uses 1-hour cache to avoid excessive API calls

Output Format

Default (text): Concise buy/hold/sell signal with 3-5 bullet points and caveats

JSON: Structured data with scores, metrics, and raw data for further analysis

Limitations

  • Data freshness: Yahoo Finance may lag 15-20 minutes
  • Sentiment data staleness:
    • Short interest data lags ~2 weeks (FINRA reporting schedule)
    • Insider trades may lag filing by 2-3 days
    • VIX term structure only updates during futures trading hours
  • Breaking news limitations (v4.0.0):
    • Google News RSS may lag by 15-60 minutes
    • Keyword matching may have false positives/negatives
    • Does not analyze sentiment, only detects keywords
    • 1-hour cache means alerts may be slightly stale
  • Missing data: Not all stocks have analyst coverage, options chains, or complete fundamentals
  • Execution time: 3-5s per stock with async parallel fetching and caching (shared indicators cached for 1h)
  • Disclaimer: All outputs include prominent "not financial advice" warning
  • US markets only: Non-US tickers may have incomplete data

Error Handling

The script gracefully handles:

  • Invalid tickers → Clear error message
  • Missing analyst data → Signal based on available metrics only
  • API failures → Retry with exponential backoff, fail after 3 attempts

Sponsors

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Details

Repository
github.com/gracefullight/stock-checker
Categories
DevOps & CI/CD, Debugging, Finance & Trading

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