The Inflation-Proof Portfolio: How Tangible Assets Performed During Every High-CPI Period Since 1970

The Hook

In June 1975, UK retail price inflation hit 26.9%. A pound saved five years earlier could now buy twenty-eight pence worth of goods.

That same month, anyone with their money in a typical mix of government bonds and UK shares was watching it evaporate. The FT 30 index had fallen from 534 to 146, a 73% collapse. Gilts had lost roughly a quarter of their real value in just two years. The 60/40 portfolio, long considered the bedrock of balanced investing, suffered a real decline of approximately 39%, according to Morningstar’s 150-year stress test.

And yet, an ounce of gold worth approximately £28 in January 1973 was now worth £69. A 146% gain, during a period when virtually every conventional asset was being destroyed.

Not a coincidence. And not the last time it happened.

The Thesis

Over the past fifty years, the UK has experienced four distinct periods of elevated inflation. The evidence across all four tells a consistent story. Though not the simple one most commentators cite.

During severe inflationary episodes, tangible assets provided dramatic protection. During moderate ones, results were more nuanced. Understanding why is what separates a smart move and a gamble.

Era 1: The 1970s

The 1970s were the defining test. UK inflation exceeded 5% essentially without interruption from 1969 through 1982. Thirteen years of sustained price instability. US CPI peaked at 12.3% in December 1974 during the first oil shock, then again at 14.8% in March 1980 during the second.

Gold dominated. During 1973–75, the London PM Fix rose from approximately $65 to $139 per ounce, a 114% gain. For UK investors, sterling’s decline amplified the effect: gold in pounds gained 146%, delivering a real return of roughly 90% after inflation.

The second wave was even more dramatic. Gold surged from $132 to $400 per ounce (+203%), peaking at $850 on 21 January 1980. Property and farmland told a similar story. UK residential prices rose from £4,480 to £23,288 over the decade (Nationwide). English farmland gained 390% (Knight Frank). US farmland rose from $197 to $737 per acre (USDA).

Now look at conventional assets. The S&P 500 roughly doubled in nominal terms between 1968 and 1982. But after cumulative US inflation of approximately 158%, investors lost roughly 60% of their purchasing power in real terms. The FT 30 crash wiped out nearly three-quarters of equity investors’ capital at its nadir. The 60/40 portfolio suffered its third-worst decline in 150 years.

Era 2: The 1989–91 Spike

UK RPI peaked at approximately 10.9% in October 1990. Significant, but nothing approaching the 1970s.

And tangible assets did not protect investors.

Gold fell 12% over the period. After inflation, a 23% loss in buying power. Silver dropped 34%. The art market, pumped up by a wave of Japanese buying (Van Gogh’s Sunflowers sold for £24.75 million at Christie’s London in March 1987; Portrait of Dr. Gachet fetched $82.5 million in May 1990), collapsed alongside the Tokyo stock market bubble. The Artprice Global Index fell 44% between 1990 and 1992. UK house prices peaked in Q3 1989 and declined about 20% by 1995, a 37% loss after inflation.

This period matters because it shows where the thesis breaks down. Tangible assets are not an automatic hedge against rising prices. How well they protect you depends on the type and severity of the inflation. The 1989–91 episode was driven by an overheating economy and oil prices, not by governments printing money or the currency losing credibility. Gold responds to the latter: when people lose faith in the monetary system itself, it thrives. Against moderate, cyclical price rises? It doesn’t do much.

The difference between those two scenarios is the difference between a sound long-term decision and an expensive mistake.

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Era 3: 2021–2023

This is the episode most readers lived through. UK CPI peaked at 11.1% in October 2022. US CPI reached 9.1% four months earlier.

Gold’s performance was more complex than the 1970s narrative would suggest. In dollar terms, it gained a modest 9% over 2021–23. In sterling, reflecting the pound’s weakness from $1.36 to $1.27, the gain was approximately 18%. Gold preserved purchasing power, but it did not dramatically exceed it.

Luxury collectibles initially surged. The KFLII art sub-index gained 29% in 2022, driven by landmark sales including Warhol’s Shot Sage Blue Marilyn at $195 million. Rare whisky had delivered 191.7% over the decade to Q4 2024. The Liv-ex Fine Wine 100 rose 23% in 2021 and 6.9% in 2022.

Then the correction arrived. The Liv-ex 100 fell 14.1% in 2023. The KFLII art index dropped 18.3% in 2024. Watches plunged 32% from peak. The Art Basel/UBS Global Art Market Report recorded total 2024 sales of $57.5 billion, down 12%.

The pattern echoed 1989–91: when central banks raised rates aggressively, the liquidity supporting tangible asset markets contracted. What separated this episode was that monetary policy actually responded. Disinflation arrived, and the flight-to-real dynamic never fully developed.

The Implication for 2026

The Bank for International Settlements has published extensively on the possibility that the three decades of low, stable inflation from 1990 to 2020 may have been an anomaly rather than a new normal. Research from the Federal Reserve Bank of Boston found that the volatility of the stickiest inflation components was 70% higher after the pandemic than before it. UK inflation stood at 3.4% in December 2025. US inflation at 2.7%. Both still above target.

The world’s most successful investors are already adjusting. Research covering 317 of the world’s wealthiest families found that nearly half their money (44%) now sits outside traditional stocks and bonds, according to the 2025 UBS Global Family Office Report.

This isn’t an argument for a short-term inflation trade. It’s an argument for holding assets whose protective qualities only show up when conventional portfolios are failing, during the kind of severe, sustained inflation that a traditional mix of stocks and bonds simply can’t handle.

What the Research Shows

There’s more serious research behind tangible asset investing than most people realise.

A 2022 Citi GPS report found that post-war and contemporary art showed a correlation of -0.04 with developed equities over the period 1962–2020. Morgan Stanley’s Global Investment Office, drawing on the Artnet database of over 340,000 artists and 1,800 auction houses, concluded that art markets “do not move in lockstep” with broader financial markets. A 2024 working paper from UCL, analysing 81,891 transactions across 157 artists from 1990–2024, found that a 10–20% allocation to blue-chip art enhanced portfolio risk-adjusted returns by approximately 20%.

None of this constitutes a recommendation. It constitutes a body of evidence that is growing faster than most investors’ awareness of it. The question is no longer whether tangible assets belong in a diversified portfolio. It is what allocation, in what form, with what liquidity constraints, and whether the research supports the specific implementation.

That question requires the full dataset, not a 2,000-word summary.