Learning Module 5
Natural Resources
Key Outcomes Summary & Practice Problems
What you must be able to do
Curriculum Year: 2026
Explain features of raw land, timberland, and farmland and their investment characteristics — return drivers (price appreciation, income from harvests/leases), TIMOs, illiquidity, and the unique "warehouse" characteristic of timberland.
Describe features of commodities and their investment characteristics — commodity sectors (energy, metals, agriculture), pricing (cost of carry, convenience yield, backwardation, contango), and investment forms (futures, ETFs, CTAs).
Analyze sources of risk, return, and diversification among natural resource investments — historical returns, volatility, inflation hedging, correlations with traditional assets, and portfolio diversification benefits.
1 · Raw Land, Farmland, and Timberland
Natural resource land investments share similarities with real estate (illiquidity, distinct location) but differ in key ways: limited focus on physical improvements and returns driven by biological growth, harvests, and commodity prices.
Return drivers: Harvest quantities, commodity prices, land price appreciation.
Income: Sale of crops (row crops, permanent crops) and lease revenue.
Risk: Weather, climate change, biological factors, diseases.
Ownership: Mostly individuals (98% of US farmland is family-owned); some institutional.
Structures: Direct ownership, partnerships, REITs.
Return drivers: Biological growth, lumber prices, land price appreciation.
Income: Sale of trees, wood products, lease revenue.
Key feature: Acts as both factory (grows trees) and warehouse (can delay harvests).
Risk: Weather, fire, pests, diseases, timber prices.
Ownership: Mostly institutional; uses TIMOs (Timberland Investment Management Organizations).
Structures: Direct ownership, partnerships, REITs, TIMOs.
Return drivers: Price of land only — no income stream.
Risk: Best alternative use, zoning, development potential.
Ownership: Mostly institutional, some individual.
Structures: Direct ownership, partnerships.
Key difference: Returns come strictly from price appreciation, unlike farmland and timberland which generate income.
Timberland's unique "warehouse" characteristic: Unlike farmland where crops must be harvested when ripe, timberland owners can delay harvest when prices are low and harvest when prices are high. This flexibility provides an option-like value and reduces forced selling risk. This is a key distinction from farmland.
TIMOs (Timberland Investment Management Organizations):Entities that manage timberland investments on behalf of institutional investors. They provide specialised expertise in acquiring, managing, and selling timberland assets. TIMOs are commonly used alongside indirect investment vehicles like limited partnerships and private REITs.
Comparison: Farmland vs Timberland
Feature | Farmland | Timberland |
|---|---|---|
Harvest flexibility | Low — crops must be harvested when ripe | High — can delay harvests |
Income stream | Regular crop sales | Irregular timber sales |
Primary investors | Mostly individuals, some institutions | Mostly institutions |
Management | Farmers, operators | TIMOs, specialised managers |
Environmental benefits | Carbon sequestration, sustainable farming | Carbon offsets, biodiversity, water quality |
2 · Commodity Investment Features
Commodities are physical goods used in production and consumption. Unlike land investments, commodities do not generate cash flows and incur carrying costs (storage, insurance, transportation). Investors seek price appreciationand portfolio diversification.
Commodity Sectors
Crude oil
Natural gas
Coal
Electricity
Copper
Aluminium
Zinc
Nickel
Gold
Silver
Platinum
Grains (wheat, corn)
Livestock
Coffee, cocoa
Cotton
Commodity Pricing: Cost of Carry & Convenience Yield
F₀(T) = S₀ × e(r + c − i) × T
Where:
S₀ = Spot price | r = Risk-free rate | c = Cost of carry (storage, insurance, transport)
i = Convenience yield (benefit of holding physical commodity) | T = Time to expiry
Spot price > Forward price (downward-sloping curve)
Occurs when convenience yield > cost of carry
Benefit of holding physical commodity exceeds carrying costs
Common during low inventory periods
Enhances long-only investor returns
Forward price > Spot price (upward-sloping curve)
Occurs when cost of carry > convenience yield
Costs of ownership exceed benefits
Common during high inventory periods
Lowers long-only investor returns
Convenience yield explained: The non-cash benefit of holding a physical commodity rather than a derivative contract. When inventories are low, market participants prefer to hold the physical asset to ensure continuous access — this drives up the spot price relative to forward prices, creating backwardation. The convenience yield is inversely related to inventory levels.
Forms of Commodity Investment
Futures/Forwards: Most common form — exchange-traded (futures) or OTC (forwards). Highly liquid, price transparency, but leveraged.
Exchange-Traded Products (ETPs): ETFs and ETNs that track commodity prices. May hold physical commodities or futures contracts.
Commodity Trading Advisors (CTAs): Managed futures funds that make directional investments based on technical and fundamental strategies.
Specialised Funds: Private energy partnerships, mutual funds focused on oil/gas sectors (upstream, midstream, downstream).
Physical ownership: Direct investment in physical commodities (storage, insurance, transportation costs).
COVID-19 oil futures example (April 2020): Demand collapsed, storage filled, and NYMEX oil futures traded below zero for the first time. The oil futures curve shifted from backwardation to contango as inventories surged. This illustrates how supply/demand dynamics and storage capacity affect commodity prices and curve shapes.
Historical Returns & Volatility
6.89%
4.39%
7.81%
Q3 1992 – Q2 2022 (S&P GSCI Total Return, MSCI ACWI, Bloomberg Barclays Global Aggregate)
Annualized return: 10.95% (Q3 1992 – Q2 2022)
Std dev: 5.88%
Best year: 33.90% (2005)
Worst year: 2.02% (2001)
Low volatility — but infrequent pricing may understate true risk
Annualized return: 8.69% (Q3 1992 – Q2 2022)
Std dev: 6.76%
Best year: 22.36% (1993)
Worst year: -5.30% (2001)
Higher volatility than farmland but still low vs public markets
Inflation Hedging
Commodities have a high positive correlation with inflation (0.54), making them an effective inflation hedge. Commodity returns are significantly higher during periods of rising inflation.
Farmland correlation with inflation: -0.17 — less effective as an inflation hedge but does not suffer during low/declining inflation.
Timberland correlation with inflation: 0.02 — neutral to inflation, offers some protection.
Commodities tend to perform poorly during periods of declining inflation (negative returns).
Portfolio Diversification — Correlations
Asset Class | Farmland | Timberland | Commodities | Global Stocks | Global Bonds |
|---|---|---|---|---|---|
Farmland | 1.00 | 0.44 | -0.13 | 0.12 | -0.02 |
Timberland | 0.44 | 1.00 | -0.12 | 0.02 | 0.00 |
Commodities | -0.13 | -0.12 | 1.00 | 0.41 | 0.00 |
Global Stocks | 0.12 | 0.02 | 0.41 | 1.00 | 0.15 |
Global Bonds | -0.02 | 0.00 | 0.00 | 0.15 | 1.00 |
Q3 1992 – Q2 2022 (NCREIF, S&P GSCI, MSCI ACWI, Bloomberg Barclays Global Aggregate)
Timberland has the lowest correlation with global stocks (0.02) — excellent diversification benefit.
Farmland correlation with global stocks is low (0.12).
Commodities have higher correlation with stocks (0.41) but still provide some diversification.
All three asset classes have near-zero correlation with global bonds.
Farmland and timberland have moderate correlation with each other (0.44) and slightly negative correlations with commodities.
Key takeaways for portfolio construction:
1. Commodities offer the best inflation hedge but higher volatility and moderate stock correlation.
2. Timberland offers the best diversification (lowest stock correlation) and flexibility through harvest timing.
3. Farmland offers stable, low-volatility returns with low stock correlation and moderate inflation protection.
4. All three asset classes have near-zero correlation with bonds, making them excellent diversifiers for balanced portfolios.
Supply adjustment lag: Commodity supply adjusts slowly to demand changes because production requires extended lead times. For agriculture, at least one growing cycle is needed. For mining and energy, infrastructure development can take years. This supply inelasticity contributes to price volatility and creates opportunities for investors who can anticipate demand shifts.