Metamask Agent Wallet
nirholas/three.ws
A skill your agent uses when the user asks anything about blockchain wallets, transactions, signing, token transfers, supported chains, wallet balances, perpetual futures trading, prediction…
Compare and select investment vehicles including mutual funds, ETFs, index funds, and separately managed accounts.
Install Fund Vehicles
$ npx skills add JoelLewis/finance_skills --skill fund-vehicles -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install JoelLewis/finance_skills fund-vehicles --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/JoelLewis/finance_skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/wealth-management/skills/fund-vehicles .claude/skills/fund-vehicles && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "fund-vehicles" agent skill from https://github.com/JoelLewis/finance_skills/tree/main/plugins/wealth-management/skills/fund-vehicles into .claude/skills/fund-vehicles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fund-vehicles", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/JoelLewis/finance_skills/tree/main/plugins/wealth-management/skills/fund-vehiclesType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add JoelLewis/finance_skills --skill fund-vehicles -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install JoelLewis/finance_skills fund-vehicles --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JoelLewis/finance_skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/wealth-management/skills/fund-vehicles .agents/skills/fund-vehicles && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "fund-vehicles" agent skill from https://github.com/JoelLewis/finance_skills/tree/main/plugins/wealth-management/skills/fund-vehicles into .agents/skills/fund-vehicles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fund-vehicles", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add JoelLewis/finance_skills --skill fund-vehicles -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install JoelLewis/finance_skills fund-vehicles --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JoelLewis/finance_skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/wealth-management/skills/fund-vehicles .cursor/skills/fund-vehicles && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "fund-vehicles" agent skill from https://github.com/JoelLewis/finance_skills/tree/main/plugins/wealth-management/skills/fund-vehicles into .cursor/skills/fund-vehicles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fund-vehicles", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/JoelLewis/finance_skills.git --path plugins/wealth-management/skills/fund-vehicles--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add JoelLewis/finance_skills --skill fund-vehicles -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install JoelLewis/finance_skills fund-vehicles --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JoelLewis/finance_skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/wealth-management/skills/fund-vehicles .gemini/skills/fund-vehicles && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "fund-vehicles" agent skill from https://github.com/JoelLewis/finance_skills/tree/main/plugins/wealth-management/skills/fund-vehicles into .gemini/skills/fund-vehicles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fund-vehicles", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install JoelLewis/finance_skills fund-vehiclesInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add JoelLewis/finance_skills --skill fund-vehicles -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/JoelLewis/finance_skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/wealth-management/skills/fund-vehicles .github/skills/fund-vehicles && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "fund-vehicles" agent skill from https://github.com/JoelLewis/finance_skills/tree/main/plugins/wealth-management/skills/fund-vehicles into .github/skills/fund-vehicles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fund-vehicles", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add JoelLewis/finance_skills --skill fund-vehicles -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install JoelLewis/finance_skills fund-vehicles --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/JoelLewis/finance_skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/wealth-management/skills/fund-vehicles .opencode/skills/fund-vehicles && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "fund-vehicles" agent skill from https://github.com/JoelLewis/finance_skills/tree/main/plugins/wealth-management/skills/fund-vehicles into .opencode/skills/fund-vehicles/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fund-vehicles", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
fund-vehicles- GitHub stars
- 206
- Token cost
- ~2k tokens
- SKILL.md length
- 996 words
- Files
- 2 (incl. scripts)
- Skills in repo
- 91
- Repo updated
- First seen
- Licence
- MIT
At a glance
Compare and select investment vehicles including mutual funds, ETFs, index funds, and separately managed accounts.
- The user asks about ETF vs mutual fund
- SKILL.md covers Core Concepts, Key Formulas, Worked Examples and Common Pitfalls, plus 2 more sections
- Runs Python scripts from its folder; calls uv, python3 and pip
- Fund tax efficiency
What it does
Fund Vehicles is an agent skill from JoelLewis/finance_skills. Compare and select investment vehicles including mutual funds, ETFs, index funds, and separately managed accounts. Use when the user asks about ETF vs mutual fund, expense ratios, fund tax efficiency, ETF creation/redemption, tracking error, or share class comparisons. Also trigger when users mention 'which fund should I buy', 'Vanguard vs Fidelity', 'index fund costs', '12b-1 fees', 'load vs no-load', 'SMA vs ETF', 'fund turnover ratio', 'securities lending', or ask how fees compound over time.
Its SKILL.md is about 2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including scripts (for example `scripts/fund_vehicles.py`).
It sits in Business, Finance & HR, covering Stock and market analysis and Banking and insurance. The repository describes itself as: Claude Code skill plugins for financial services — 81 skills across 7 domain plugins covering investment management, compliance, advisory practice, trading, and operations. The licence is MIT.
When your agent uses it
- The user asks about ETF vs mutual fund
- Fund tax efficiency
- ETF creation/redemption
- Share class comparisons
Example prompts
- “which fund should I buy”
- “Vanguard vs Fidelity”
- “index fund costs”
- “/fund-vehicles”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit 5c498ea. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Ships 1 file in scripts/ (Python), which the agent can run.
Shell commands in SKILL.md call:
uvpython3pip
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use uv and pip, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Fund Vehicles loads about 2k tokens when it runs. Until then it costs about 129 tokens; SKILL.md has 996 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.
SKILL.md
The full file from JoelLewis/finance_skills at commit 5c498ea, republished under its MIT licence (© JoelLewis). 996 words, ~2,032 tokens.
Download SKILL.mdSave it as
.claude/skills/fund-vehicles/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- fund-vehicles
- description
- Compare and select investment vehicles including mutual funds, ETFs, index funds, and separately managed accounts. Use when the user asks about ETF vs mutual fund, expense ratios, fund tax efficiency, ETF creation/redemption, tracking error, or share class comparisons. Also trigger when users mention 'which fund should I buy', 'Vanguard vs Fidelity', 'index fund costs', '12b-1 fees', 'load vs no-load', 'SMA vs ETF', 'fund turnover ratio', 'securities lending', or ask how fees compound over time.
Fund Vehicles
Core Concepts
Vehicle Comparison: Decision-Relevant Differences
- Trading: ETFs trade intraday at market prices that can deviate from NAV (premiums/discounts, especially in volatile markets or for illiquid underlying assets); mutual funds transact once daily at NAV.
- Tax efficiency: ETFs generally distribute far fewer capital gains than mutual funds (mechanism below); SMAs allow lot-level tax-loss harvesting that pooled vehicles cannot.
- Customization: SMAs hold individual securities directly, so investors can exclude stocks/sectors and harvest specific lots; minimums are typically $100K-$1M+ with fees above index ETFs.
- Cost: broad index ETFs and index mutual funds cost as little as 0.01-0.05%; active mutual funds commonly cost 0.50-1.00%+ before any loads.
Expense Ratios
Total annual cost as a percentage of AUM, deducted from fund returns. Includes management fees, administrative costs, and sometimes 12b-1 distribution fees. The expense ratio is the single most predictive factor of future fund performance — lower-cost funds consistently outperform higher-cost funds within the same category.
Tracking Difference
The actual return gap between a fund and its benchmark index over a period. Tracking difference = Fund Return - Index Return. Expense ratio is a floor for tracking difference, but additional factors (securities lending income, sampling, cash drag, trading costs) can make tracking difference better or worse than the expense ratio.
Tax Efficiency and the Creation/Redemption Mechanism
The general tax-efficiency hierarchy: ETFs > index mutual funds > actively managed mutual funds.
Authorized Participants (APs) create ETF shares by delivering a basket of the underlying securities in-kind, and redeem by receiving securities in-kind. These in-kind transfers do not trigger capital gains, so ETFs rarely distribute gains. Mutual funds must sell securities to meet redemptions, distributing the resulting gains to all remaining shareholders — taxable events even for buy-and-hold investors.
Securities Lending Revenue
Funds can lend their holdings to short sellers in exchange for a fee. This revenue can partially or fully offset fund expenses, sometimes resulting in tracking difference better than the expense ratio. Large index funds are major securities lenders.
Turnover Ratio
Measures how frequently a fund buys and sells its holdings. Higher turnover leads to more taxable capital gains distributions, higher transaction costs, and greater market impact. Typical turnover: index funds 3-10%, active funds 50-200%+.
12b-1 Fees and Loads
- 12b-1 fees: annual distribution and marketing fees (0.25-1.0%), included in the expense ratio.
- Front-end loads: one-time sales charge at purchase (typically 3-5.75%), reducing the initial investment.
- Back-end loads (CDSCs): Contingent Deferred Sales Charges paid upon redemption, typically declining to 0% over 5-7 years.
Key Formulas
| Formula | Expression | Use Case |
|---|---|---|
| Expense Drag (annual) | AUM × Expense Ratio | Annual cost of fund ownership |
| Tracking Difference | Fund Return - Index Return | Actual cost of indexing |
| Fee Impact (compounded) | FV = PV × (1 + r - ER)^n vs PV × (1 + r)^n | Long-term fee drag |
| Tax Cost Ratio | Pre-Tax Return - After-Tax Return | Tax efficiency measure |
| NAV | (Total Assets - Liabilities) / Shares Outstanding | Fund share value |
Worked Examples
Example 1: Long-Term Fee Impact
Given: $100,000 invested for 30 years at 8% gross return. Fund A: 0.03% expense ratio. Fund B: 0.75% expense ratio. Calculate: Final values and fee drag for each fund Solution: Fund A: $100,000 × (1 + 0.08 - 0.0003)^30 = $100,000 × (1.0797)^30 = $997,914 Fund B: $100,000 × (1 + 0.08 - 0.0075)^30 = $100,000 × (1.0725)^30 = $816,430 Difference: $997,914 - $816,430 = $181,484
The 0.72% annual fee difference (0.75% - 0.03%) compounds to $181,484 over 30 years — approximately 18% of the low-cost fund's terminal value. This is wealth destroyed by fees for an identical gross return.
Show full SKILL.md (440 more words)Show less
Example 2: ETF vs Mutual Fund Tax Efficiency
Given: Identical S&P 500 portfolios, $100,000 invested for 20 years. Gross return 10%, expense ratio 0.03% for both, so both grow at 9.97% before distribution taxes. The ETF distributes $0 in capital gains (in-kind redemptions). The mutual fund distributes 2% of NAV in long-term capital gains each year-end. The investor is in the 20% LTCG bracket.
Assumptions: Distributions are taxed at 20% in the year received; the after-tax remainder is reinvested and adds to cost basis. Both positions are liquidated after year 20, with remaining unrealized gains taxed at 20%.
Calculate: After-tax liquidation values Solution:
ETF — all gains deferred until sale:
- Pre-tax terminal value: $100,000 × (1.0997)^20 = $669,090
- Liquidation tax: ($669,090 - $100,000) × 20% = $113,818
- After-tax value: $555,272
Mutual fund — year-by-year, each year the position grows 9.97%, distributes 2% of NAV, and pays 20% tax on the distribution (equivalent to multiplying by 1.0997 × 0.996 each year):
- Pre-liquidation value after 20 years: $617,549
- Taxes paid on distributions along the way: $23,888 (on $119,442 of cumulative distributions)
- Cost basis: $100,000 + $95,554 reinvested after-tax distributions = $195,554
- Liquidation tax: ($617,549 - $195,554) × 20% = $84,399
- After-tax value: $617,549 - $84,399 = $533,150
The ETF's tax deferral advantage is $555,272 - $533,150 = $22,122 over 20 years on this $100,000 investment — the cost of paying tax annually instead of letting the full balance compound until sale.
Common Pitfalls
- Ignoring tracking difference — it can be worse than the expense ratio due to cash drag, sampling, and trading costs
- Not considering tax efficiency when comparing returns — pre-tax fund returns overstate what taxable investors actually keep
- Confusing NAV with market price for ETFs — ETFs can trade at premiums or discounts to NAV, especially in volatile markets or for illiquid underlying assets
- Overlooking securities lending income that offsets expenses — some index funds achieve tracking difference better than their expense ratio
Cross-References
- equities (wealth-management plugin): equity fund selection and equity index tracking
- fixed-income-sovereign (wealth-management plugin): bond fund considerations (see also fixed-income-corporate (wealth-management plugin))
- tax-efficiency (wealth-management plugin): comprehensive after-tax investment analysis
- asset-allocation (wealth-management plugin): selecting vehicles within an asset allocation
- factor-investing (wealth-management plugin): evaluating factor ETFs and smart-beta funds on factor purity, turnover, capacity, and fee per unit of loading
Running the script
uv run scripts/fund_vehicles.pyThe PEP 723 header resolves the numpy dependency automatically. Alternatively run python3 scripts/fund_vehicles.py after pip install numpy.
- Bare run prints a demo covering fee impact, tracking error, NAV premium/discount, fund overlap, and ETF-vs-mutual-fund tax efficiency.
--verifyre-runs the demo computations and asserts the outputs match this skill's worked examples (prints PASS/FAIL, nonzero exit on mismatch).--helplists the available classes.
The file is primarily meant to be imported as a module, e.g. from fund_vehicles import ExpenseAnalysis, TrackingAnalysis, TaxEfficiency.
© JoelLewis, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (scripts) in plugins/wealth-management/skills/fund-vehicles of JoelLewis/finance_skills.
- SKILL.md
- scripts/fund_vehicles.py
Open the folder on GitHubat commit 5c498ea
Compare with similar skills
Fund Vehicles next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Fund Vehicles this skillJoelLewis/finance_skills | 206 | — | ~2k | Automated safety check: Pass | MIT | |
| Metamask Agent Walletnirholas/three.ws | 230 | — | ~4.5k | Automated safety check: Pass | MIT | |
| Stock APIzhangxiangliang/stock-api | 2k | — | ~507 | Automated safety check: Pass | MIT | |
| Tushare Datazillionare/zillionare | 322 | 2 repos | ~2.3k | Automated safety check: Pass | None | |
| Tradingview MCPatilaahmettaner/tradingview-mcp | 5k | — | ~1.3k | Automated safety check: Pass | MIT | |
| Digital Oraclekomako-workshop/digital-oracle | 878 | — | ~5.9k | Automated safety check: Pass | MIT |
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Questions about Fund Vehicles
What does Fund Vehicles do?
Compare and select investment vehicles including mutual funds, ETFs, index funds, and separately managed accounts. Fund Vehicles is an agent skill from JoelLewis/finance_skills. Compare and select investment vehicles including mutual funds, ETFs, index funds, and separately managed accounts.
When should I use Fund Vehicles?
Fund Vehicles fits situations like: the user asks about ETF vs mutual fund; fund tax efficiency; ETF creation/redemption; share class comparisons.
How do I install Fund Vehicles in Claude Code?
Run `npx skills add JoelLewis/finance_skills --skill fund-vehicles -a claude-code`. Or copy the skill folder (plugins/wealth-management/skills/fund-vehicles in JoelLewis/finance_skills) into .claude/skills/fund-vehicles in your project. Claude Code loads it when a task matches its description.
How do I install Fund Vehicles in Codex?
Run `npx skills add JoelLewis/finance_skills --skill fund-vehicles -a codex`. Or copy the skill folder (plugins/wealth-management/skills/fund-vehicles in JoelLewis/finance_skills) into .agents/skills/fund-vehicles in your project. Codex loads it when a task matches its description.
Can I use Fund Vehicles in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add JoelLewis/finance_skills --skill fund-vehicles -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fund-vehicles, .gemini/skills/fund-vehicles, .github/skills/fund-vehicles and .opencode/skills/fund-vehicles in your project.
What does Fund Vehicles need to run?
Going by SKILL.md and its folder, Fund Vehicles needs Python for the scripts in its folder and the command-line tools its instructions call (uv, python3 and pip). Our summary lists: Python 3.
Does Fund Vehicles access the network?
SKILL.md contains no URLs. Its commands use uv and pip, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Fund Vehicles safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. The check reads SKILL.md only: the scripts in the folder are not scanned, so read them before running anything.
What licence does Fund Vehicles use?
Fund Vehicles is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Fund Vehicles use?
About 2k tokens (SKILL.md is roughly 8.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Fund Vehicles?
Skills that share tags, products or a category with Fund Vehicles: Metamask Agent Wallet (nirholas/three.ws, 230 stars), Stock API (zhangxiangliang/stock-api, 2k stars), Tushare Data (zillionare/zillionare, 322 stars) and Tradingview MCP (atilaahmettaner/tradingview-mcp, 5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Fund Vehicles?
JoelLewis (a GitHub user) maintains it in JoelLewis/finance_skills, which has 206 GitHub stars. The repository holds 91 skills in this directory. The repository was last updated on July 18, 2026.
Source: JoelLewis/finance_skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.