defeatbeta-dcf

Business

Generate a fully editable Discounted Cash Flow (DCF) valuation spreadsheet for a public company. Builds a single-sheet Excel workbook with WACC, growth estimates, 10-year FCF projections, and fair price — all wired as live formulas so users can flex discount rate or growth assumptions and see fair price update. Triggers on DCF analysis, discounted cash flow, intrinsic value, fair price estimate, build a DCF model, value [company].

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DCF Valuation Spreadsheet

Build a fully editable, formula-driven DCF model for a public company. All inputs come from the defeatbeta MCP server's get_stock_dcf_analysis tool. The skill renders the data into a single-sheet .xlsx whose every projection, NPV, and fair-price cell is an Excel formula — so the user can change the discount rate, growth-rate assumptions, cash, or share count and watch fair price recalculate.

Workflow

Step 1: Fetch DCF data via MCP

Call the MCP tool:

get_stock_dcf_analysis(symbol="<TICKER>")

If the response contains an error key (e.g. ETFs / indices without financial statements), stop and surface the error to the user.

Step 2: Save the payload to a temporary JSON

# Pseudocode — Claude writes the dict returned by MCP to a temp file
echo "<dcf-data-as-json>" > /tmp/<TICKER>_dcf.json

Step 3: Build the Excel workbook

Run the build script from this skill:

python <SKILL_DIR>/scripts/build_dcf_excel.py /tmp/<TICKER>_dcf.json ./<TICKER>_DCF.xlsx

Output is {SYMBOL}_DCF.xlsx in the current working directory by default.
Override path by passing it as the second argument.

Step 4: Recalculate so previewers show numbers

openpyxl writes formula strings but does not evaluate them. Most spreadsheet apps recalc on open, but lightweight previewers (and Claude's file preview) need cached values:

python <SKILL_DIR>/scripts/recalc.py ./<TICKER>_DCF.xlsx

The recalc script uses libreoffice --headless --calc to evaluate every formula and write the cached value back into the file. If LibreOffice is not on PATH, the script prints a warning and exits cleanly — the workbook is still valid, it will just show blank cells in previewers until opened in Excel/Numbers/WPS.

Install LibreOffice if you want in-Claude preview to show numbers:

macOS: brew install --cask libreoffice
Debian/Ubuntu: sudo apt-get install libreoffice-calc
Other: see https://www.libreoffice.org/download/

Step 5: Surface the file to the user

Tell the user the output path and call out what is editable:

Generated AAPL_DCF.xlsx. Editable cells (light grey fill, blue font) drive everything downstream: change the discount rate or growth rates in the DCF Template section to see fair price update.

Workbook Layout

Single sheet, four vertical sections:

Discount Rate (WACC) — Market cap, beta, debt, interest expense, risk-free rate, expected market return → derives weights, cost of debt/equity, WACC. WACC is a live formula.
Growth Estimates — 3-year historical revenue with computed 3Y CAGR; up to 10 annual EPS TTM snapshots with computed multi-year CAGR; 5-year annual 10Y Treasury averages.
DCF Template — Future growth rate assumptions (1–5Y, 6–10Y, terminal), discount rate, TTM revenue, base FCF, then a 10-year FCF / Terminal Value / Total Value / FCF Margin grid. Years 1–5 grow at the near-term rate; years 6–10 use linear interpolation toward terminal.
DCF Value — Enterprise Value via NPV(discount_rate, Total Value year 1..10), plus cash and debt → equity value → fair price → margin of safety → Buy/Sell recommendation.

Color & font conventions

Element	Fill	Font
Section headers	Dark blue `#1F4E79`	White bold
Column headers (year labels)	Light blue `#D9E1F2`	Black bold
Input cells (user-editable assumptions)	Light grey `#F2F2F2`	Blue `#0000FF`
Formula cells	White	Black
Key totals (WACC, Fair Price, MoS)	Medium blue `#BDD7EE`	Black bold

The user can identify what is editable at a glance: anything in blue font on a grey background is fair game; black-on-white is a derived formula.

Notes for the assistant

The MCP tool returns numeric values already (TTM, base FCF, historical CAGRs as cached values). The build script writes those as input cells and derives every projection / valuation cell via formula referencing the inputs. Never paste a pre-computed projection into the sheet — write the formula.
dcf_template.projections[0] is the TTM base (year 0). Years 1–10 are formula columns.
terminal_value is non-zero only at year 10.
recommendation is "Buy" or "Sell" (mixed case, not all-caps).
After recalc, sanity check: the workbook's computed fair_price should match dcf_value.fair_price from the MCP payload to within rounding.

Failure modes

MCP returns error (no financials): tell the user, do not generate Excel.
LibreOffice not installed: recalc step prints a warning; the .xlsx is still valid for Excel/Numbers users.
Formula references broken: the build script writes deterministic cell addresses (no dynamic offsets), so this should not happen — if it does, regenerate.