Conciseness

The body is dense and lean — defaults tables with one-line rationales, code commented only where non-obvious (e.g., "yfinance columns are newest-first; reverse to oldest -> newest"), and no explanation of concepts Claude already knows. Falls short of 5 because of trimmable redundancy: the host-specific Codex paragraph in the preamble, and method weights plus the sensitivity-grid spec stated twice (defaults table and again in Step 7 code). Not 3: none of this is padded explanation, just minor duplication.

Actionability

The primary DCF + relative path is near copy-paste ready — real yfinance row labels, exact parameter defaults, and working Python for Steps 3-5 and 7. Minor gaps keep it from 5: Step 7 branches on `sotp_price` which is never assigned anywhere in the body, `tv_exit` hardcodes `* 15` despite Step 5 computing `med_ev_eb` as the peer median, and the SOTP branch (Step 6) is prose-only with computation deferred to the reference. Not 3: the code is executable, not pseudocode, and covers the common cases.

Workflow Clarity

A clear 8-step sequence with explicit validation checkpoints and recovery loops: the Step 1 environment-probe decision tree, Step 4 gates ("if `wacc <= g_terminal` → stop", TV-ratio flags, sector sanity band), a full error-handling table with concrete recovery actions (e.g., "Peer data fetch fails → Drop that peer from median"), and a 9-item ordered output checklist in Step 8. Not 4: validation and feedback loops are explicit at each stage rather than merely present with minor gaps.

Progressive Disclosure

The body is an overview with quick skeletons that defers full methodology to four reference files; all four (`dcf.md`, `relative_valuation.md`, `sotp.md`, `wacc_erp_rates.md`) exist, are signaled in context where needed, and are indexed in a Reference Files section with one-line descriptions. Verified against the actual bundle: references are one level deep (only external URLs inside, no nested .md chains). Not 4: navigation is easy and the split is appropriate with no orphaned or buried references.

Specificity

Quotes multiple concrete actions with comprehensive coverage: "Estimate a public company's intrinsic value with DCF, relative (peer multiple), and sum-of-the-parts (SOTP) methods, then blend them into an implied share price with upside/downside vs the market price, a WACC and terminal-growth sensitivity grid, and bull/base/bear scenarios" — three named methods plus blending, sensitivity, and scenario outputs. Not 4: there are no coverage gaps; every claimed capability is a specific, named action.

Completeness

Explicitly answers both questions: the "what" is the three-method estimate blended into an implied share price with sensitivity and scenarios, and the "when" is a full "Use this skill whenever the user asks..." clause enumerating concrete trigger phrases. Not 4: the when-clause is not merely present but exhaustive and specific; not 3 because no half is missing or weakly implied.

Trigger Term Quality

Comprehensive natural-term coverage with synonyms: "what a company or ticker is worth", "fair value", "intrinsic value", "implied share price", "a price target from fundamentals", "whether it is overvalued or undervalued", "building a DCF (WACC, terminal value, discounted cash flow)", "EV/EBITDA or P/E based targets", "peer comparison valuation", "SOTP and conglomerate discounts". Not 4: common user phrasings and their synonyms are all present; no natural term is missing.

Distinctiveness Conflict Risk

Occupies a clear niche — fundamental valuation of public companies — with distinct triggers (DCF, fair value, price target from fundamentals, SOTP, conglomerate discount) unlikely to fire for unrelated skills. The closing "Run the model rather than answering valuation questions from memory" further separates it from generic research/lookup skills. Not 4: overlap risk with adjacent finance skills is minimal given the trigger set is valuation-specific.