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daringanitchdaringanitch/claude-stock-analyst/skills/etf-compare/SKILL.md

etf-compare

Skill9 starsChanged 6 months agoMITView on GitHub

Side-by-side ETF comparison. Use when the user wants to compare two or more ETFs, decide between ETFs covering the same space, or understand the difference between similar funds.

The file

We split this skill into the rules it gives an agent

3 rules. About 0 are common, 3 are distinctive, and 0 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈3

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 0

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Distinctive:

    Run a side-by-side comparison of the ETFs provided.

    line 6
  2. Distinctive:

    If overlap >70%: flag — owning both is redundant

    line 27
  3. Distinctive:

    If the user provides more than 2 ETFs, run the comparison as a ranked table and eliminate the weakest option first with a clear explanation.

    line 43

≈ “Common” is an estimate: at least 1 in 5 of the 350,495 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

Run a side-by-side comparison of the ETFs provided. Structure:

1. WHAT EACH ONE IS One sentence per ETF: strategy, index tracked, issuer.

2. SIDE-BY-SIDE SCORECARD

Metric[ETF 1][ETF 2]
AUM
Expense ratio
# of holdings
Top holding (% weight)
Top 10 as % of portfolio
1yr return
3yr annualized
Beta vs S&P 500
Avg daily volume

3. OVERLAP ANALYSIS

  • What % of holdings do they share?
  • If overlap >70%: flag — owning both is redundant
  • Where they diverge: what does one own that the other doesn't?

4. WHAT YOU'RE ACTUALLY CHOOSING BETWEEN

  • Is this a cost decision? (same exposure, different fee)
  • Is this a conviction decision? (different index methodology = different bet)
  • Is this a liquidity decision? (one trades much more thinly)
  • Is this a tax decision? (different distribution behavior)

5. FACTOR DIFFERENCES Which ETF loads more heavily on: growth / value / momentum / quality / size? Under what market conditions does each outperform the other?

6. VERDICT: WHICH ONE AND WHY Give a clear recommendation. If the answer is genuinely "it depends," explain on what — don't hedge without a reason.

If the user provides more than 2 ETFs, run the comparison as a ranked table and eliminate the weakest option first with a clear explanation.

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