| name | company-market-cap |
| description | Retrieve market capitalization data for a single company using the Octagon Claude plugin. Use when you need the current market value, valuation context, or size classification for any publicly traded stock. |
Company Market Cap
Retrieve the current market capitalization for a single company using the Octagon Claude plugin.
Prerequisites
Ensure the Octagon Claude plugin is installed and configured in Claude Code before invoking this skill.
Workflow
1. Identify the Stock
Determine the ticker symbol for the company you want to analyze (e.g., AAPL, MSFT, GOOGL).
2. Execute Query via the Octagon Claude plugin
Use the octagon-agent tool with a natural language prompt:
Get market capitalization data for the symbol <TICKER>.
MCP Call Format:
{
"server": "octagon-claude-plugin",
"toolName": "octagon-agent",
"arguments": {
"prompt": "Get market capitalization data for the symbol AAPL."
}
}
3. Expected Output
The agent returns precise market cap data:
| Date | Market Capitalization (USD) |
|---|
| 2026-02-02 | $3,968,586,877,215.00 |
Additional context provided:
- Rounded value (e.g., $3.97 trillion)
- As-of date for the data
- Data source
Data Sources: octagon-stock-data-agent
4. Interpret Results
See references/interpreting-results.md for guidance on:
- Understanding market cap magnitude
- Size classification
- Valuation context
- Historical comparison
Example Queries
Basic Query:
Get market capitalization data for the symbol AAPL.
With Context:
What is the current market cap for Tesla?
Historical Reference:
What is Microsoft's market capitalization and how has it changed recently?
Valuation Context:
What is NVDA's market cap and how does it compare to other chipmakers?
Size Classification:
What size category is AMD based on its market cap?
Understanding Market Cap
Definition
Market Cap = Current Share Price × Shares Outstanding
What It Represents
| Aspect | Description |
|---|
| Total Value | Market's valuation of all shares |
| Size Indicator | Company scale and influence |
| Index Weight | Determines index composition |
| Acquisition Cost | Theoretical buyout price |
What It Doesn't Represent
| Misconception | Reality |
|---|
| Intrinsic Value | Market perception, not fundamental worth |
| Book Value | Different from accounting value |
| Enterprise Value | Excludes debt and cash |
| Sale Price | Acquisitions often have premiums |
Size Classifications
Standard Categories
| Category | Range | Characteristics |
|---|
| Mega-cap | >$200B | Global leaders, household names |
| Large-cap | $10B-$200B | Established, stable companies |
| Mid-cap | $2B-$10B | Growth potential, moderate risk |
| Small-cap | $300M-$2B | Higher growth, higher volatility |
| Micro-cap | $50M-$300M | Speculative, limited coverage |
| Nano-cap | <$50M | Highest risk, low liquidity |
Trillion-Dollar Club
| Threshold | Significance |
|---|
| >$1T | Elite status, massive scale |
| >$2T | Global economic influence |
| >$3T | Among world's most valuable |
Market Cap Analysis
Valuation Ratios
| Ratio | Formula | Purpose |
|---|
| P/E | Market Cap / Net Income | Earnings valuation |
| P/S | Market Cap / Revenue | Revenue valuation |
| P/B | Market Cap / Book Value | Asset valuation |
| PEG | P/E / Growth Rate | Growth-adjusted value |
Enterprise Value Comparison
| Metric | Calculation |
|---|
| Enterprise Value | Market Cap + Debt - Cash |
| EV/EBITDA | EV / Operating earnings |
| EV/Revenue | EV / Total revenue |
Contextual Analysis
Industry Comparison
| Question | Purpose |
|---|
| Largest in sector? | Market leadership |
| Above/below median? | Relative positioning |
| Gap to leader? | Distance from top |
Historical Perspective
| Timeframe | Analysis |
|---|
| 1 Year | Recent performance |
| 5 Years | Medium-term trend |
| 10 Years | Long-term growth |
| All-time High | Peak valuation |
Global Context
| Comparison | Purpose |
|---|
| vs. Global Leaders | Scale perspective |
| vs. Country GDP | Economic significance |
| vs. Index Total | Market weight |
Factors Affecting Market Cap
Price Drivers
| Factor | Impact |
|---|
| Earnings | Fundamental driver |
| Growth | Future expectations |
| Sentiment | Market psychology |
| Macro | Economic conditions |
Share Count Changes
| Event | Effect |
|---|
| Buybacks | Reduces shares, concentrates value |
| Issuance | Increases shares, dilutes |
| Stock Split | No effect (price adjusts) |
| Spin-offs | Separates value |
Common Use Cases
Investment Analysis
What is the market cap for XYZ and how does it compare to peers?
Portfolio Context
What is the market capitalization of my largest holding, AAPL?
News Context
Apple's market cap after today's earnings announcement?
Valuation Check
Is TSLA's market cap justified relative to its revenue?
Analysis Tips
-
Use precise values: Full number for calculations, rounded for communication.
-
Note the date: Market cap changes constantly with price.
-
Consider float: Some shares may not be tradeable.
-
Compare appropriately: Same industry, similar business models.
-
Understand drivers: Price appreciation vs. share changes.
-
Enterprise value: Add debt consideration for M&A context.
Integration with Other Skills
| Skill | Combined Use |
|---|
| stock-quote | Market cap + current price details |
| batch-market-cap | Single company vs. peer group |
| income-statement | Market cap vs. earnings |
| balance-sheet | Market cap vs. book value |
| financial-metrics-analysis | Full valuation analysis |
