Stock research platform

Fundamental research,
built for conviction.

Good Bull helps you research stocks with clear, repeatable valuation math — Rule #1 style checks, discounted cash flow, P/E and PEG views, and a combined intrinsic range — so you can compare ideas on a level playing field.

Free with account

Screen and compare on fundamentals

Create a free account to use the stock screener, open core valuation views on each stock, and browse community lists. Filter on growth, ROIC, debt, upside, and more — then dig into Rule #1, DCF, P/E, and PEG on individual names.

Pro subscription

Model, monitor, and stay notified

Upgrade for the valuation workbench, weekly Top Upside reports, watchlist alerts, portfolio tracking with analyst twelve-month upside, and automatic peer comparison on stock pages — built for investors who want a full research workflow.

Why Good Bull

A clearer research workflow

Most tools show you data. Good Bull helps you build conviction — screen on fundamentals, model intrinsic value with multiple methods, verify the math, and monitor names you care about.

Rule #1 valuation

Sticker price and margin of safety from projected earnings, a conservative P/E cap, and Phil Town–style quality checks on growth, ROIC, and debt.

Multiple valuation lenses

Rule #1, discounted cash flow, P/E, and PEG combined into a confidence-weighted intrinsic range — not just a single headline number.

Fundamentals-first screener

Filter the universe on ROIC, earnings growth, debt-to-equity, P/E, upside, and intrinsic value — then open any match for a full breakdown.

Transparent math log

See the assumptions and steps behind each valuation so you can verify the math instead of trusting a black box.

Research depth on each stock

Fundamentals, analyst ratings and price targets, earnings history, SEC filings, insider activity, and institutional ownership on stock detail pages.

Pro alerts & portfolio

Set watchlist rules on analyst upside and quality thresholds, track holdings, and get weekly reports on top upside candidates.

Early access

Be first when we launch

Join the waitlist for launch updates, early access to the app, and curated research highlights.

We respect your inbox. No spam — just launch updates.

For investors & partners

Building the research stack for fundamental investors

Good Bull is a subscription research app with a free tier: screener, core valuations, and community lists for every account. Pro adds the valuation workbench, upside reports, alerts, portfolio monitoring, and peer comparison. Public stock research pages drive discovery; the app is where serious screening and modeling happen.

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