
Market Data
stock-price-checker
Stock Price Checker is a lightweight Python CLI tool that fetches current equity and ETF data from Yahoo Finance using the yfinance library. It returns structured JSON containing symbol, real-time price, absolute and percent change, previous close, market capitalization, volume, and 52-week high/low
Overview
Stock Price Checker is a lightweight Python CLI tool that fetches current equity and ETF data from Yahoo Finance using the yfinance library.
Stock Price Checker is a lightweight Python CLI tool that fetches current equity and ETF data from Yahoo Finance using the yfinance library. It returns structured JSON containing symbol, real-time price, absolute and percent change, previous close, market capitalization, volume, and 52-week high/low. Key features include no API key requirement, graceful error handling for invalid symbols or missing fields, and compatibility with most major stocks and ETFs. Use cases include quick command-line lookups, embedding price checks in automation scripts or alerts, populating dashboards, validating market data for backtests, and ad-hoc portfolio monitoring. Core advantages are simplicity, cross-platform portability, comprehensive data fields in machine-readable JSON, and easy integration into existing Python workflows or DevOps pipelines.
Skill.md
How this skill works
Stock Price Checker is a lightweight Python CLI tool that fetches current equity and ETF data from Yahoo Finance using the yfinance library. It returns structured JSON containing symbol, real-time price, absolute and percent change, previous close, market capitalization, volume, and 52-week high/low
Stock Price Checker
Get current stock prices from Yahoo Finance using the yfinance library.
Quick Commands
cd skills/stock-price-checker
# Check stock price
python3 stock-price.py NVDA
# Check another stock
python3 stock-price.py AAPL
Usage Examples
Check NVIDIA stock:
python3 stock-price.py NVDA
Check VOO (S&P 500 ETF):
python3 stock-price.py VOO
Check QQQ (Nasdaq-100 ETF):
python3 stock-price.py QQQ
Check any stock symbol:
python3 stock-price.py TSLA
python3 stock-price.py MSFT
python3 stock-price.py AAPL
Output Format
{
"symbol": "NVDA",
"price": 189.52,
"change": 3.05,
"change_percent": 1.64,
"previous_close": 186.47,
"market_cap": 4614243483648,
"volume": 112439494,
"fifty_two_week_high": 212.19,
"fifty_two_week_low": 86.62
}
Technical Notes
- Uses yfinance library to fetch data from Yahoo Finance
- No API key required
- Handles errors gracefully
- Works with most major stocks and ETFs
- Returns comprehensive data including market cap, volume, and 52-week range
Troubleshooting
- If the stock symbol is invalid, the script will return an error
- Some data (like market cap) may not be available for all symbols
Best used for
When to use it
Stock Price Checker is a lightweight Python CLI tool that fetches current equity and ETF data from Yahoo Finance using the yfinance library. It returns structured JSON containing symbol, real-time price, absolute and percent change, previous close, market capitalization, volume, and 52-week high/low

01 · PRE-MEETING
Prepare a decision brief
Turn scattered evidence into a structured case before an investment committee meeting.

02 · TEAM WORKFLOW
Standardize handoffs
Create consistent research outputs across analysts, portfolio managers, and agents.

03 · LIVE UPDATE
Refresh the thesis
Update scenarios after a new catalyst, KPI release, or earnings result.
Community notes
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