Common Sense Index Investing

Common Sense Index Investing is a Data skill for Claude Code, published by simbajigege in book2skills.

161 stars30 forkson simbajigege/book2skillsAdded 2026/09/08+4% in starsRepository updated 2026/08/26

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Install in seconds

Install Common Sense Index Investing

Copy Common Sense Index Investing into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/simbajigege/book2skills/tree/main/skills/common-sense-index-investing-bogle ~/.claude/skills/common-sense-index-investing-bogle

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/simbajigege/book2skills.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/common-sense-index-investing-bogle/SKILL.md in simbajigege/book2skills
Installs to: ~/.claude/skills/common-sense-index-investing-bogle
Collection: One of 25 skills cataloged from this repository
Category: Data — 812 skills

What Common Sense Index Investing does

Common Sense Index Investing applies Bogle's rules to fund selection, fees, asset allocation, and buy-and-hold discipline. Use it to compare index vs active funds, assess cost drag, and simplify a portfolio.

Common Sense Index Investing is cataloged under Data on DirSkills. Common Sense Index Investing comes from a repository tagged agent-skills, agentskills, anthropic, anthropic-claude and book2skills.

Documentation

README

Excerpt

The Little Book of Common Sense Investing — Index Investing Skill

Knowledge source: The Little Book of Common Sense Investing by John C. Bogle.

Overview

Use this skill to evaluate investment fund choices, portfolio simplicity, cost drag, index fund discipline, asset allocation, and buy-hold behavior using Bogle's common-sense investing framework. It is educational decision support, not personalized financial advice.

When to Use This Skill

Use this skill when the user asks:

"Should I use an index fund or active fund?"
"Are these fund fees too high?"
"How should I think about ETFs, smart beta, or advisers?"
"What stock/bond allocation is sensible?"
"Am I overcomplicating my portfolio?"

Core Principle

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Common Sense Index Investing

What else does simbajigege publish alongside Common Sense Index Investing?
Common Sense Index Investing is one of 25 skills that DirSkills catalogs from simbajigege/book2skills, the repository it ships in. Its siblings there include Agent Memory Implementation, Agent Tool Builder and Business Adventures Analysis. Each one is a separate skill with its own page in this directory, installs the same way Common Sense Index Investing does, and is maintained by simbajigege in that same repository. The rest of the collection is listed on the simbajigege/book2skills page.
How does Common Sense Index Investing compare to other Data skills?
Common Sense Index Investing ranks #759 by stars among the 812 Data skills in this catalog. The most-starred ones next to it are Benchmark Methodology, Jupyter Notebook and Solana. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Common Sense Index Investing against them. Open each page to compare what they document and how they install.