sector-analysis

sector-analysis is a skill for Claude Code, Codex from yennanliu/InvestSkill. It costs 8 tokens per session (6,093 once invoked), scanned A, original, MIT.

A US stock-market skill that compares the 11 major S&P 500 sectors, such as technology, healthcare, and financials. Sector rotation means money moving between these groups as market conditions change.

In plain words
What is it for?
Use it to review sector performance, study economic-cycle effects, and identify possible sector rotation opportunities.
Why use it?
It helps assess which parts of the market may be gaining or losing support during different economic conditions.

Skill for Claude CodeCodex

Part of the us-stock-analysis plugin — 27 skills shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/yennanliu/investskill/sector-analysis
Any agent
npx skills add yennanliu/InvestSkill --skill sector-analysis
Clone the repo
git clone --depth 1 https://github.com/yennanliu/InvestSkill

Made for: Claude Code, Codex.

Or install us-stock-analysis, the plugin that ships this one along with the rest of its 27 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for sector-analysis

README.md
[![agentmods](https://agentmods.dev/badge/skills/yennanliu/investskill/sector-analysis.svg)](https://agentmods.dev/skills/yennanliu/investskill/sector-analysis)
Your own site
<a href="https://agentmods.dev/skills/yennanliu/investskill/sector-analysis"><img src="https://agentmods.dev/badge/skills/yennanliu/investskill/sector-analysis.svg" alt="Measured on agentmods" height="20"></a>
Per session 8 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,093 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00008 $0.06093
Opus 5 $0.00004 $0.03047
Sonnet 5 $0.00002 $0.01219
Haiku 4.5 $0.00001 $0.00609

Measured 5d ago against content hash 859725f65590, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

sector-analysis scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/us-stock-analysis/skills/sector-analysis/SKILL.md · 408 lines

How it starts

The opening of the file, as written. The whole thing — 408 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Sector Analysis

⚠️ Data Verification — Do This Before Any Analysis

Before running any analysis, always retrieve the latest market data for the ticker:

  1. Fetch current price — use web search or ask the user for the live price, 52-week range, and market cap. Never assume a price from training data.
  2. Confirm key figures — recent earnings, revenue, key ratios (P/E, P/S, etc.) as applicable to this skill.
  3. State your data source — note where the numbers came from (e.g., "Google Finance, June 19 2026") at the top of the output.
  4. Flag stale data explicitly — if live data is unavailable, display this warning before proceeding:

⚠️ Live data unavailable. The following analysis uses training-data estimates which may be significantly out of date. Verify all prices and metrics before making any decisions.

Never silently substitute training-data estimates for current prices. When in doubt, ask the user to paste the latest quote.


Analyze US market sectors and identify sector rotation opportunities based on economic cycles.

Sector Overview

Analyze the 11 S&P 500 sectors:

  1. Information Technology
  2. Healthcare
  3. Financials
  4. Consumer Discretionary
  5. Communication Services
  6. Industrials
  7. Consumer Staples
  8. Energy
  9. Utilities
  10. Real Estate
  11. Materials

Analysis Framework

  1. Sector Performance

    • Relative performance vs. S&P 500
    • Historical performance trends
    • Momentum and trend strength
    • Volatility analysis
  2. Economic Cycle Positioning

    • Early cycle: Financials, Technology, Industrials
    • Mid cycle: Industrials, Materials, Energy
    • Late cycle: Energy, Consumer Staples, Healthcare
    • Recession: Utilities, Consumer Staples, Healthcare
  3. Fundamental Metrics

    • Sector valuation (P/E, P/B vs. historical)
    • Earnings growth forecasts
    • Profit margin trends
    • Revenue growth outlook
  4. Macro Drivers

    • Interest rate sensitivity
    • Commodity price exposure
    • Economic growth correlation
    • Currency impact
    • Regulatory environment

Read the full file on GitHub · 408 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 408 lines · 8 tokens per session scan A 859725f65590

Subscribe to this mod's changes

sector-analysis is a skill published in the GitHub repository yennanliu/InvestSkill (199 stars, last pushed today), licensed MIT. It adds 8 tokens to every session and 6,093 once invoked, about $0.0000 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.