My Toolz

💰 Finance & Investing

Research, simulators, taxes, and tools for investors.

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Largest U.S. Company vs. S&P 500

30-year backtest: $100,000 would have grown to $3.08 million with annual rebalancing—but turnover frequency changes the conclusion.

Compounders

In-depth analysis of companies with the potential to compound value for many years.

2026 Investment Theses

Vistra, Micron, Broadcom, Symbotic, and Circle: five 1–3 year theses with drivers, risks, and invalidation criteria.

PBCD Group Status

Tracking the AFBNDES / FAPES / BNDES negotiations.

B3 Stock Screener

Sort and filter Brazilian stocks by P/E, P/B, dividend yield, ROE, ROIC, and the Magic Formula—with automated daily data.

B3 Fundamentals History

Track P/E, P/B, dividend yield, ROE, ROIC, margins, debt, and other fundamentals month by month, with stock comparisons.

Investment Simulator

Compare after-tax returns for Brazilian fixed-income and pension products under variable CDI assumptions.

2025 Brazilian Income Tax Calculator

Monthly income tax, profit sharing, PGBL limits, and annual reconciliation using Brazil’s official tax tables.

Global ETF Track Record

CAGR performance ranking for 71 global ETFs.

2025 Investment Theses

An interactive overview of 10 companies to watch.

Allocation Calculator

A barbell allocation simulator focused on personal antifragility.

Convexity Dashboard

Mathematical proof and Black Swan simulations using real data.

BRL/EUR Exchange-Rate Curve

A Chart.js prototype using public exchange-rate data.

Gurus: Ray Dalio

The paradigm shift: a framework for a resilient portfolio (2026).

Gurus: Nassim Taleb

The antifragility handbook: strategies for the 2025 environment.

Gurus: Joel Greenblatt

The Magic Formula and time arbitrage for investors (2026).

Savings Calculator

Plan future withdrawals toward a retirement goal.

BNDES Practical Guide

BNDES financing products and how to use them, step by step.

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