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Personal finance, investing, and financial literacy.

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Build an insider-buying screener with Python and SEC Form 4 data

Build an insider-buying screener with Python and SEC Form 4 data

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8 min read
Annual billing looks cheaper. Here is the month it actually becomes cheaper.

Annual billing looks cheaper. Here is the month it actually becomes cheaper.

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2 min read
How AI Hyperscaler Debt Is Repricing Its Own Hurdle Rate

How AI Hyperscaler Debt Is Repricing Its Own Hurdle Rate

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4 min read
Build a Polymarket research brief with Python and AlphAI

Build a Polymarket research brief with Python and AlphAI

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7 min read
68 public trading strategies: 12 declare a trial count, 0 report a Sharpe

68 public trading strategies: 12 declare a trial count, 0 report a Sharpe

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6 min read
How to Calculate the Real APR of a Loan with Fees in TypeScript

How to Calculate the Real APR of a Loan with Fees in TypeScript

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6 min read
Your rent-vs-buy break-even is two different numbers and nobody tells you which one you're seeing

Your rent-vs-buy break-even is two different numbers and nobody tells you which one you're seeing

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4 min read
14.6 million official exchange rates from 107 central banks and tax authorities, now on Hugging Face

14.6 million official exchange rates from 107 central banks and tax authorities, now on Hugging Face

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5 min read
LaunchTower Factor Model Report — 2026-09-14 (81 US large-caps)

LaunchTower Factor Model Report — 2026-09-14 (81 US large-caps)

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4 min read
The Matrix of HFT: Unpacking the Hype

The Matrix of HFT: Unpacking the Hype

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5 min read
How I Rank 19 Mega-Cap Tech Stocks With a Momentum + Quality Factor Model (Real Data, Reproducible)

How I Rank 19 Mega-Cap Tech Stocks With a Momentum + Quality Factor Model (Real Data, Reproducible)

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5 min read
How Expected Value Exposes the Break-Even Failure Rate of an Extended Warranty

How Expected Value Exposes the Break-Even Failure Rate of an Extended Warranty

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4 min read
Borsa Verisiyle Çalışırken Sürekli Dönüp Dolaşıp Kullandığım 6 Python Kütüphanesi

Borsa Verisiyle Çalışırken Sürekli Dönüp Dolaşıp Kullandığım 6 Python Kütüphanesi

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6 min read
409A Valuation for Founders: Safe Harbor, Fair Market Value and the Strike Price — 409A Valuation Guide (Part 1)

409A Valuation for Founders: Safe Harbor, Fair Market Value and the Strike Price — 409A Valuation Guide (Part 1)

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6 min read
The Option Pricing Model, Backsolve and PWERM (Part 2)

The Option Pricing Model, Backsolve and PWERM (Part 2)

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6 min read
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