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Personal finance, investing, and financial literacy.

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A zero-dependency financial math library for TypeScript

A zero-dependency financial math library for TypeScript

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3 min read
Stop Writing Slow Loops: 5 Vectorized Python Scripts Every Quant & Algo Trader Needs in 2026

Stop Writing Slow Loops: 5 Vectorized Python Scripts Every Quant & Algo Trader Needs in 2026

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5 min read
Month-end reconciliation took me a full afternoon until I pasted two lists

Month-end reconciliation took me a full afternoon until I pasted two lists

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3 min read
Reverse-engineering a P/E ratio in 10 lines of JavaScript (with Alphabet as a worked example)

Reverse-engineering a P/E ratio in 10 lines of JavaScript (with Alphabet as a worked example)

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6 min read
Anthropic's IPO filing, line by line: how the $900.9B compute figure breaks down, and what $84.6B covers

Anthropic's IPO filing, line by line: how the $900.9B compute figure breaks down, and what $84.6B covers

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12 min read
A股“僵尸股”图谱:低流动性个股的数量、分布与收益

A股“僵尸股”图谱:低流动性个股的数量、分布与收益

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2 min read
How Much GST Is Hiding Inside an MRP? A Simple Worked Example

How Much GST Is Hiding Inside an MRP? A Simple Worked Example

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3 min read
Why You Should Read an Amortization Schedule Before Signing Any Loan

Why You Should Read an Amortization Schedule Before Signing Any Loan

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2 min read
Moving beyond LLM hallucinations in macroeconomics: Real-time ECB data via MCP

Moving beyond LLM hallucinations in macroeconomics: Real-time ECB data via MCP

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4 min read
A股月度效应与季节性:1月效应存在吗?

A股月度效应与季节性:1月效应存在吗?

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3 min read
A股5,700余只个股成交额截面:钱都去了哪?——二八现象的数据形态

A股5,700余只个股成交额截面:钱都去了哪?——二八现象的数据形态

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2 min read
I built a tiny tool for the problem every BNPL app hides: the stack

I built a tiny tool for the problem every BNPL app hides: the stack

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2 min read
Why my credit risk model uses a 15% threshold

Why my credit risk model uses a 15% threshold

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2 min read
Volatility Risk Premium in Python: The Formula Is One Line, the Conventions Are Everything

Volatility Risk Premium in Python: The Formula Is One Line, the Conventions Are Everything

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6 min read
Why ExchangeRate-API Is Not a Standard Reference Rate: What Its Own Terms and Docs Say

Why ExchangeRate-API Is Not a Standard Reference Rate: What Its Own Terms and Docs Say

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7 min read
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