GMO is a Boston asset manager co-founded in 1977 by Jeremy Grantham with Richard Mayo and Eyk Van Otterloo, known for valuation-driven dynamic asset allocation built on long-horizon mean reversion. Grantham is famous for calling historic bubbles, warning publicly ahead of both the 2000 dot-com crash and the 2008 financial crisis. Flagship publications include the GMO Quarterly Letter (now written by Asset Allocation co-heads Ben Inker and John Pease), Grantham's Viewpoints essays and the 7-Year Asset Class Forecast.

This report argues that natural resource stocks (like oil and metal companies) became the cheapest in history after oil prices crashed in April 2020. The key insight: even if commodity prices stay flat, these stocks could still deliver strong returns through valuation recovery or high dividends (payments to shareholders). For ordinary investors, this means a contrarian opportunity: when others sell due to climate fears or panic, buying at rock-bottom prices might pay off. It's worth reading because it uses historical data to show that extreme cheapness alone can be a buy signal, without needing to predict commodity prices.
GMO Research Report: An Investment Only a Mother Could Love: Tactical Reasons was published on April 30, 2020, by Lucas White and Jeremy Grantham, focusing on investment opportunities in natural resource equities. The core argument is that resource company valuations are at historic lows relative to
This chapter focuses on the tactical investment opportunities in natural resource stocks amid the extreme market environment of early 2020. The report was written in April 2020, following oil prices falling below $20 per barrel and WTI crude oil futures turning negative for the first time in history. At that point, resource stock valuations had dropped from "cheap" to "the cheapest on record."
The author's central judgment is: Resource stocks are trading at the lowest valuation relative to the overall stock market on record. Even if commodity prices remain flat, resource stocks can generate strong returns through valuation mean reversion or high dividend yields. The counterintuitive point is that the author believes investors do not need to be bullish on commodity prices; the current valuation levels alone are sufficient to support the investment thesis. Furthermore, the sell-off driven by ESG and climate concerns has created a unique opportunity for return-oriented investors.
1. Valuation Contraction is the Primary Reason for Resource Stocks' Underperformance Over the Past Decade:
2. Historical Return Comparison (2000s vs. 2010s):
| Period | MSCI ACWI Commodity Producers Index (Real Annualized Return) | S&P 500 (Real Annualized Return) |
|---|---|---|
| 2000s | Approximately +9% | Over -3% |
| 2010s | Approximately -1% | Over +11% |
3. Commodity Price Trends:
4. Capital Cycle Logic: Low commodity prices → Reduced supply / capacity exit → Compressed valuations → Increased probability of commodity price mean reversion.
Energy and metals companies are at historically low valuations relative to the S&P 500, falling to approximately 0.3x in March 2020, far below the historical average of 0.8x.
1. This is Historically the Best Time to Overweight Resource Stocks – The author asks rhetorically: "If not now, when?"
2. Investors Do Not Need to Be Bullish on Commodity Prices – Even if commodity prices stay flat, valuation mean reversion or high dividend yields can generate returns.
3. ESG-Driven Selling Creates Buying Opportunities – Capital outflows driven by non-investment factors actually increase expected returns.
4. The Climate Transition Itself Requires the Resource Industry – Clean energy relies on materials like copper, lithium, and nickel; the global economy cannot function without the extractive sector.
In a follow-up, the author further elaborates on the impact of the capital cycle on the resource industry, providing historical data and comparative analysis to support the argument that "the current moment is an excellent entry point." The following supplements the thesis with evidence and viewpoints from three key dimensions.
The author emphasizes that the capital cycle is the core force driving commodity prices. When prices are low, capital expenditure (capex) is cut, supply is reduced, ultimately leading to future supply shortages and price increases. This mechanism was already evident before the pandemic: despite production being higher than a decade ago, energy and metals companies cut capital expenditure by approximately 40% over the past ten years (see Exhibit 3). Meanwhile, dividend payments grew by 70%, indicating a greater focus on shareholder returns rather than unchecked expansion.
Comparative Data: Changes in Capex and Dividends (Past Decade)
| Metric | Change |
|---|---|
| Capital Expenditure | -40% |
| Dividend Payments | +70% |
This "double-counting" effect (i.e., reduced supply pushing prices higher, while simultaneously improving market sentiment and lifting valuations) explains the significant rebound in the resource sector. The author argues that the current low-price environment is "self-healing," and future supply shortages will support price recovery.
Over the past decade, capital expenditure by energy and metals companies has fallen by approximately 40%, while dividend distributions have grown by approximately 70%.
The author presents a counterintuitive view: even if commodity prices do not rise, the resource sector can outperform the broader market. From 1926 to 2009, commodity prices fell slightly in real terms (annualized -0.1%), but energy and metals companies delivered annualized returns 3.1% higher than the S&P 500 (see Exhibit 4). This is because resource companies have historically traded at a discount of around 20%, and the current discount is even larger, providing a greater margin of safety.
Historical Return Comparison (1926-2009, Real Returns)
| Asset Class | Annualized Return |
|---|---|
| Energy and Metals Companies | +3.1% |
| Commodity Prices | -0.1% |
| S&P 500 | Benchmark (3.1% lower than resource companies) |
Currently, the MSCI ACWI Commodity Producers Index offers a dividend yield of 7.1%, significantly higher than the S&P 500's 1.9% (see Exhibit 5). Even without further valuation expansion, high dividends alone can drive strong returns.
Dividend Yield Comparison (as of March 31, 2020)
| Index | Dividend Yield |
|---|---|
| MSCI ACWI Commodity Producers Index | 7.1% |
| S&P 500 | 1.9% |
The author points out that inflation is one of the biggest risks for long-term investors, and the unprecedented fiscal and monetary stimulus (e.g., zero interest rates, massive money printing) could heighten inflation risk. The resource sector performs well during inflationary periods: over the past 100 years, during high inflation, energy and metals companies delivered annualized real returns of approximately +6%, while the S&P 500 suffered real losses of about 1.5% (per original data). This is because commodity prices rise with inflation, or currency depreciation pushes commodity prices higher.
Return Comparison During Inflationary Periods (Past 100 Years)
| Asset Class | Annualized Real Return |
|---|---|
| Energy and Metals Companies | +6% |
| S&P 500 | -1.5% |
From 1926 to 2009, energy and metals companies achieved an annualized return of 3.1%, while commodities had an annualized return of -0.1%.
The author believes resource stocks are one of the best hedges against inflation, especially given their currently extremely low valuations and high dividend yields.
The author observes that institutional investors almost never overweight the resource sector, even when its valuations are highly attractive. This "never-overweight" behavior leads to persistent mispricing of the asset class. Currently, the discount of the resource sector relative to the broader market is at an extreme historical level, and investors are shunning it due to risk aversion, which in turn creates an opportunity for contrarian investors.
Key Conclusion: The resource sector's current low valuations, high dividends, and improved capital discipline allow it to deliver strong returns even without rising commodity prices. Combined with inflation risk and the capital cycle dynamic, the current moment may be an excellent entry point for long-term investors.
| Commodity | 20-Year Real Price Increase (2000-2020) | Average Annual Demand Growth (2010-2020) | Key Supply-Side Constraints |
|---|---|---|---|
| Iron Ore | +100% | 3.5-4% | Declining high-grade ore reserves; extended development cycles for new mines in Brazil and Australia |
| Copper | +60% | 3.5-4% | Ore grade declining from 0.8% to 0.5%; fewer new large-scale discoveries |
| Palladium | +200% | 2-3% | Constrained supply from South Africa; declining Russian inventories |
| Coal | +30% | 1.3% | Sustained demand growth in China and India, but environmental policies restrict new mine approvals |
The MSCI ACWI Commodity Producers Index offers a dividend yield of 7.1%, significantly higher than the S&P 500's 1.9%.