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yahoo-finance

gracefullight/stock-checker

Get stock prices, quotes, fundamentals, earnings, options, dividends, and analyst ratings from Yahoo Finance—no API key required.

What is yahoo-finance?

A Python CLI tool that fetches comprehensive stock market data from Yahoo Finance using the yfinance library. Use it to quickly check prices, analyze fundamentals, track earnings, compare securities, and explore options chains across US stocks, international markets, crypto, and ETFs.

  • Fetch real-time stock prices and detailed quotes
  • Retrieve fundamentals including PE ratios, EPS, market cap, and analyst targets
  • Access earnings dates, estimates, and historical surprise data
  • Display dividend rates, yields, and payout history
  • Show analyst ratings with buy/hold/sell distribution and recent changes
  • Retrieve options chains with strike prices, bid/ask, volume, and implied volatility

How to install yahoo-finance

npx skills add https://github.com/gracefullight/stock-checker --skill yahoo-finance
Prerequisites
  • Python 3.11 or higher
  • uv package manager (auto-install script provided)
Claude Code
Cursor
Windsurf
Cline

How to use yahoo-finance

  1. 1.Make the yf script executable with chmod +x /path/to/skills/yahoo-finance/yf
  2. 2.Optionally symlink to PATH for global access: ln -sf /path/to/skills/yahoo-finance/yf /usr/local/bin/yf
  3. 3.Run any command (first run auto-installs yfinance and rich dependencies via uv)
  4. 4.Use symbol format: US stocks (AAPL), Indian NSE (RELIANCE.NS), crypto (BTC-USD), ETFs (SPY), or forex (EURUSD=X)

Use cases

Good for
  • Quick price checks for individual stocks or crypto assets
  • Fundamental analysis and valuation metric comparison for investment research
  • Earnings calendar tracking and earnings surprise analysis
  • Options trading analysis with near-the-money chain data
  • Portfolio comparison across multiple tickers or international markets
Who it's for
  • Individual investors and traders
  • Financial analysts and researchers
  • Portfolio managers comparing multiple securities
  • Developers building stock market applications
  • Anyone needing quick access to public market data without API keys

yahoo-finance FAQ

Do I need an API key?

No. The skill uses yfinance which accesses Yahoo Finance data without requiring an API key.

What symbol formats are supported?

US stocks (AAPL, MSFT), Indian NSE (RELIANCE.NS, TCS.NS), Indian BSE (RELIANCE.BO), crypto (BTC-USD, ETH-USD), forex (EURUSD=X), and ETFs (SPY, QQQ).

How long does the first run take?

First run takes ~5 seconds to install dependencies to uv's cache. Subsequent runs are instant.

What should I do if I get rate limiting errors?

Yahoo Finance may rate limit excessive requests. Wait a few minutes and try again.

How do I find a stock symbol if I don't know it?

Use yf search "company name" to discover symbols across US, Indian, crypto, and other markets.

Full instructions (SKILL.md)

Source of truth, from gracefullight/stock-checker.


name: yahoo-finance description: Get stock prices, quotes, fundamentals, earnings, options, dividends, and analyst ratings using Yahoo Finance. Uses yfinance library - no API key required.

Yahoo Finance CLI

A Python CLI for fetching comprehensive stock data from Yahoo Finance using yfinance.

Requirements

  • Python 3.11+
  • uv (for inline script dependencies)

Installing uv

The script requires uv - an extremely fast Python package manager. Check if it's installed:

uv --version

If not installed, install it using one of these methods:

macOS / Linux

curl -LsSf https://astral.sh/uv/install.sh | sh

macOS (Homebrew)

brew install uv

Windows

powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

pip (any platform)

pip install uv

After installation, restart your terminal or run:

source ~/.bashrc  # or ~/.zshrc on macOS

Installation

The yf script uses PEP 723 inline script metadata - dependencies are auto-installed on first run.

# Make executable
chmod +x /path/to/skills/yahoo-finance/yf

# Optionally symlink to PATH for global access
ln -sf /path/to/skills/yahoo-finance/yf /usr/local/bin/yf

First run will install dependencies (yfinance, rich) to uv's cache. Subsequent runs are instant.

Commands

Price (quick check)

yf AAPL              # shorthand for price
yf price AAPL

Quote (detailed)

yf quote MSFT

Fundamentals

yf fundamentals NVDA

Shows: PE ratios, EPS, market cap, margins, ROE/ROA, analyst targets.

Earnings

yf earnings TSLA

Shows: Next earnings date, EPS estimates, earnings history with surprises.

Company Profile

yf profile GOOGL

Shows: Sector, industry, employees, website, address, business description.

Dividends

yf dividends KO

Shows: Dividend rate/yield, ex-date, payout ratio, recent dividend history.

Analyst Ratings

yf ratings AAPL

Shows: Buy/hold/sell distribution, mean rating, recent upgrades/downgrades.

Options Chain

yf options SPY

Shows: Near-the-money calls and puts with strike, bid/ask, volume, OI, IV.

History

yf history GOOGL 1mo     # 1 month history
yf history TSLA 1y       # 1 year
yf history BTC-USD 5d    # 5 days

Ranges: 1d, 5d, 1mo, 3mo, 6mo, 1y, 2y, 5y, 10y, ytd, max

Compare

yf compare AAPL,MSFT,GOOGL
yf compare RELIANCE.NS,TCS.NS,INFY.NS

Side-by-side comparison with price, change, 52W range, market cap.

Search

yf search "reliance industries"
yf search "bitcoin"
yf search "s&p 500 etf"

Symbol Format

  • US stocks: AAPL, MSFT, GOOGL, TSLA
  • Indian NSE: RELIANCE.NS, TCS.NS, INFY.NS
  • Indian BSE: RELIANCE.BO, TCS.BO
  • Crypto: BTC-USD, ETH-USD
  • Forex: EURUSD=X, GBPUSD=X
  • ETFs: SPY, QQQ, VOO

Examples

# Quick price check
yf AAPL

# Get valuation metrics
yf fundamentals NVDA

# Next earnings date + history
yf earnings TSLA

# Options chain for SPY
yf options SPY

# Compare tech giants
yf compare AAPL,MSFT,GOOGL,META,AMZN

# Find Indian stocks
yf search "infosys"

# Dividend info for Coca-Cola
yf dividends KO

# Analyst ratings for Apple
yf ratings AAPL

Troubleshooting

"command not found: uv"

Install uv using the instructions above.

Rate limiting / connection errors

Yahoo Finance may rate limit excessive requests. Wait a few minutes and try again.

"No data" for a symbol

  • Verify the symbol exists: yf search "company name"
  • Some data (options, dividends) isn't available for all securities

Technical Notes

  • Uses PEP 723 inline script metadata for uv dependencies
  • Rich library provides colored, formatted tables
  • First run installs deps to uv cache (~5 seconds)
  • Subsequent runs are instant (cached environment)
  • Handles NaN/None values gracefully with fallbacks