Real Inflation Rate Considering Global Money Supply Growth

There is no single official "real inflation rate" that accounts for global money supply growth — it depends heavily on your definition and methodology. But here's a comprehensive breakdown of what the evidence shows as of April 2026.

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🧮 The Framework: Quantity Theory of Money

The starting point is the classical equation of exchange:

$$M \times V = P \times Y$$

Where $M$ = money supply, $V$ = velocity, $P$ = price level, $Y$ = real output. Rearranged for inflation:

$$\pi \approx \Delta M + \Delta V - \Delta Y$$

If velocity is roughly stable, "monetary inflation" ≈ money supply growth − real GDP growth.imf.org

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📊 The Key Numbers (Early 2026)

Official Consumer Price Inflation

• US CPI (March 2026): 3.3% year-over-year (headline), 2.6% core. March saw a 0.9% monthly jump driven by a 21.2% gasoline surge and Iran war energy shock.bls.gov
• Global headline inflation (IMF April 2026 WEO): ~3.5–4.4%, projected to tick up modestly in 2026 before declining.imf.org
• OECD headline (Feb 2026): ~3.4%.oecd.org

Global Money Supply Growth

Here the models diverge significantly (confidence scores reflect this):

Major Central Banks (early 2026)

• US M2: ~4.9–5.6% YoY, at record $22.5T. Fed cut 175bps and returned to QE ($40B/mo Treasury purchases).mises.org
• China M2: 8.5% YoY (March 2026), ¥353.86Tnews.cn
• Euro area M3: ~3.0% YoY (Feb 2026)
• Japan M3: ~2.7% YoY (Feb 2026)
• GDP-weighted major-bloc average: ~5–6%

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🎯 What "Real Inflation" Looks Like Under Different Lenses

Lens 1: Pure Currency Debasement (Hard-Money View)

Simply equate inflation with money creation rate:

$$\pi_{\text{debasement}} \approx 6.7\%\text{ to }10.4\% \text{ globally}$$

Popular with Austrian economists and Bitcoin advocates. Since 2009, US TMS is up 206%+ and nearly 30% of all US dollars in existence were created since January 2020.mises.org

Lens 2: Excess Money Growth (Quantity Theory)

$$\pi_{\text{implied}} = \Delta M - \Delta Y$$

Lens 3: Alternative Methodologies (ShadowStats)

Using 1990s-era BLS methodology, true CPI reads ~8%; using 1980s methodology, ~10–12%. However, critics note ShadowStats doesn't actually recompute — it applies a crude upward adjustment to official numbers, so these should be viewed as illustrative, not rigorous.fullstackeconomics.com

Lens 4: Asset-Price Inflation

CPI excludes housing purchase prices, equities, gold, and crypto — precisely where new money flows first. Effective inflation for preserving purchasing power vs. real assets has been running in double digits most years since 2020.

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📋 Summary Table — April 2026

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⚠️ Critical Caveats (Where the Models Disagree)

High-confidence consensus:

• Official CPI structurally understates monetary debasement
• Global money growth has re-accelerated in late 2025 / early 2026
• Long-term money growth ≈ 7% CAGR
• The Fed returned to QE in 2025

Significant disagreement among models:

• Current global M2 YoY: Estimates range from 3.1% (IMF, older data) to 10.4% (Voronoi, Dec 2025). The dollar-denominated figure is inflated by ~10% USD depreciation
• Whether to call this "real inflation": The IMF/ECB explicitly warn that money growth ≠ inflation due to velocity and output effects. Velocity has been declining for decades, absorbing much expansion into assets rather than CPI
• Magnitude of the gap: Conservative estimates put true inflation at 2–5%; aggressive hard-money estimates put it at 7–10%+

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🎯 Bottom Line

The honest range for "real inflation considering global money supply growth" is:

$$\boxed{\pi_{\text{real}} \approx 4\% \text{ to } 7\% \text{ globally}}$$

• If you trust official CPI: ~3.3% (US), ~3.5% (world)
• If you adjust for excess money growth over output: ~4–6%
• If you define inflation as pure currency debasement: ~7–10%
• If you include asset-price inflation: well into double digits in many years

Practical implication for you in Hong Kong: Holding HKD (pegged to USD) long-term means losing purchasing power at a rate meaningfully above the official 2–3% figure — particularly against scarce assets (real estate, equities, gold, Bitcoin). The gap between CPI and monetary inflation is essentially the "hidden tax" that has driven asset holders to dramatically outpace wage earners over the past 15+ years. Claims of 15%+ "true inflation" are not well-supported by current data — the 2020–2021 money surge has largely worked through the system — but 2–3% CPI also understates the real dilution rate.