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/fund-vehicles

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

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finance-skills
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$ npx -y skills add JoelLewis/finance_skills --skill fund-vehicles --agent claude-code

How it fires

How this skill gets triggered: by you, by Claude, or both.

  • Fires itselfAuto-invocation. Claude auto-loads it when your prompt matches the work.Auto-invocation is when the right skill fires by itself at the right moment, driven by a FLOW.md router and a hook, instead of you invoking it by name. It is the difference between a skill being installed and a skill actually getting used.Read the full definition →
  • You can call itInvoke it directly when you want it.
  • Slash command/fund-vehicles

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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

SKILL.md

fund-vehicles.SKILL.md
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.

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 - $1
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Ships withfinance-skills

A collection of Claude Code skill plugins for financial services. 91 skills across 7 domain plugins teach Claude investment management, regulatory compliance, advisory workflows, trading operations, and more — so it can assist with finance questions, build

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Repo: JoelLewis/finance_skills

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