Company Market Cap

Retrieve the current market capitalization for a single company using the Octagon MCP server.

Prerequisites

Ensure Octagon MCP is configured in your AI agent (Cursor, Claude Desktop, Windsurf, etc.). See references/mcp-setup.md for installation instructions.

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 Octagon MCP

Use the octagon-agent tool with a natural language prompt:

Get market capitalization data for the symbol <TICKER>.

MCP Call Format:

{
  "server": "octagon-mcp",
  "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Historical Reference: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