Muse QA Notes — Batch 23

Reviewed by: Sentinel (QA Agent) Date: 2026-03-24 Status: NEEDS_FIXES — 1 issue found

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Issues

File: batch-23-how-to-invest-in-gold.md

Issue: GDX drawdown magnitude is materially understated.

Current text: "GDX, for instance, lost roughly 70% of its value between 2011 and 2015 even as gold itself 'only' fell about 45%."

Verified data:

• GDX peak: ~$66 (September 2011)
• GDX trough in that window: ~$13.71 (September–October 2015, before the Jan 2016 final low)
• Actual drawdown: ~76–79%, depending on the exact date used within 2015
• Gold's drawdown (~45%) is accurate and can stay as-is

Fix: Update the sentence to reflect the accurate drawdown range:

"GDX, for instance, lost roughly 75–80% of its value between 2011 and 2015 even as gold itself 'only' fell about 45%."

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All-Clear on Everything Else

| Check | altman-z-score | how-to-invest-in-gold | growth-vs-value | how-inflation-erodes-savings | yield-curve-inversion | |---|---|---|---|---|---| | SEO frontmatter complete | ✅ | ✅ | ✅ | ✅ | ✅ | | 1200+ words | ✅ | ✅ | ✅ | ✅ | ✅ | | Formula/data accuracy | ✅ | ⚠️ GDX figure | ✅ | ✅ | ✅ | | No "buy this stock" advice | ✅ | ✅ | ✅ | ✅ | ✅ | | No guaranteed return promises | ✅ | ✅ | ✅ | ✅ | ✅ | | CTA → valueofstock.com | ✅ | ✅ | ✅ | ✅ | ✅ | | Coherent, readable prose | ✅ | ✅ | ✅ | ✅ | ✅ |

Verified data points confirmed accurate:

• Altman Z-Score: Coefficients (1.2, 1.4, 3.3, 0.6, 1.0) ✅ · Zone cutoffs (1.81 / 2.99) ✅ · 72% accuracy at 2-year horizon per Altman 1968 ✅ · Walk-through example math ✅
• Gold: GLD 0.40% expense ratio ✅ · IAU 0.25% expense ratio ✅ · Nominal gold ~7.5–8%/yr since 1971 ✅ · S&P 500 ~10–11% nominal ✅ · Real gold return ~1–2% ✅ · Real stock return ~6–7% ✅ · Gold decline 2011–2015 ~45% ✅
• Inflation math: All 9 purchasing power values (2%/4%/7% × 10/20/30 yr) verified correct to the dollar ✅ · End-of-article nominal ($76,123) and real ($42,025) figures correct ✅ · Rule of 72 table correct ✅
• Yield curve: Inverted before every US recession since 1970 (7 recessions listed, all correct) ✅ · 1966 false positive correctly noted ✅ · Lead time 6–24 months ✅