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.
npx skills add yennanliu/InvestSkill --skill fundamental-analysisgit clone --depth 1 https://github.com/yennanliu/InvestSkillWrote 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.
[](https://agentmods.dev/skills/yennanliu/investskill/fundamental-analysis)<a href="https://agentmods.dev/skills/yennanliu/investskill/fundamental-analysis"><img src="https://agentmods.dev/badge/skills/yennanliu/investskill/fundamental-analysis.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00009 | $0.00892 |
| Opus 5 | $0.00005 | $0.00446 |
| Sonnet 5 | $0.00002 | $0.00178 |
| Haiku 4.5 | $0.00001 | $0.00089 |
Grade A, and why
fundamental-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 8d 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.
How it starts
The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Fundamental Analysis
This skill has been merged into
stock-eval. Use/us-stock-analysis:stock-evalfor comprehensive fundamental + quality + valuation analysis.
Quick Reference — Key Ratios
| Ratio | Formula | What It Measures |
|---|---|---|
| P/E (Price-to-Earnings) | Market Price / EPS | How much investors pay per dollar of earnings; compare to peers and history |
| P/B (Price-to-Book) | Market Price / Book Value per Share | Premium over net asset value; useful for financials and asset-heavy businesses |
| P/S (Price-to-Sales) | Market Cap / Revenue | Valuation relative to revenue; useful when earnings are negative or depressed |
| EV/EBITDA | Enterprise Value / EBITDA | Capital-structure-neutral earnings multiple; standard M&A and cross-sector benchmark |
| ROE (Return on Equity) | Net Income / Shareholders' Equity | Profitability relative to equity book value; decompose with DuPont for quality assessment |
| ROIC (Return on Invested Capital) | NOPAT / Invested Capital | True economic return on all capital deployed; compare to WACC to assess value creation |
| Current Ratio | Current Assets / Current Liabilities | Short-term liquidity; >1.5x generally healthy; <1.0x signals potential liquidity stress |
| D/E (Debt-to-Equity) | Total Debt / Shareholders' Equity | Financial leverage; higher ratio = more risk but also more return amplification |
For the full analysis framework — income statement line-item breakdown, working capital cycle, DuPont decomposition, cash conversion cycle, Porter's Five Forces, Piotroski F-Score, DCF, ROIC/WACC, and risk matrix — use /us-stock-analysis:stock-eval.
Standard Signal Output
All analysis concludes with this standardized block:
## Thesis Invalidation
After delivering the analysis signal, specify what would reverse it:
**If signal is BULLISH — thesis breaks if:**
- Price closes below the MA200 / key support level identified in this analysis on above-average volume
- revenue growth decelerates below 5% for 2 consecutive quarters AND gross margin contracts >200bps
- Macro regime shift: Fed pivots hawkish unexpectedly, recession probability >60%
**If signal is BEARISH — thesis breaks if:**
- Price closes above key resistance / MA200 level with volume confirmation
- revenue reaccelerates >15% AND margin expansion resumes
- Fundamental improvement: surprise earnings beat >20% with guidance raise
**Re-run this analysis when:**
- [ ] Next earnings release
- [ ] Price moves ±15% from current level
- [ ] 60 days have elapsed
- [ ] Material news event (acquisition, leadership change, regulatory decision)
╔══════════════════════════════════════════════╗
║ INVESTMENT SIGNAL ║
╠══════════════════════════════════════════════╣
║ Signal: BULLISH / NEUTRAL / BEARISH ║
║ Confidence: HIGH / MEDIUM / LOW ║
║ Horizon: SHORT / MEDIUM / LONG-TERM ║
║ Score: X.X / 10 ║
╠══════════════════════════════════════════════╣
║ Action: BUY / HOLD / SELL ║
║ Conviction: STRONG / MODERATE / WEAK ║
╚══════════════════════════════════════════════╝
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.
- 8d ago First seen · 67 lines · 9 tokens per session scan A 7f51cea843bd
fundamental-analysis is a skill published in the GitHub repository yennanliu/InvestSkill (204 stars, last pushed yesterday), licensed MIT. It adds 9 tokens to every session and 892 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.
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