The commodity cycle is the recurring pattern of boom and bust in raw material prices — driven by the fundamental economics of supply, demand and time. Understanding this cycle is the single most valuable framework any investor in stocks, bonds or real assets can have. It explains why oil goes from $20 to $130 and back. Why copper triples and then halves. Why shipping stocks can return 400% in two years and lose 80% in the next three.
What Causes the Commodity Cycle?
The commodity cycle is caused by a fundamental mismatch between the speed at which demand changes and the speed at which supply responds. Demand can change in months — a stimulus package, a cold winter, a factory opening — but supply takes years to respond.
A copper mine takes 10-15 years from discovery to first production. A deepwater oil platform takes 5-7 years to develop. A shipyard takes 18-36 months to deliver a new vessel. This long lag between price signal and new supply is what creates the extreme swings in commodity prices — and in the stocks of companies that produce them.
The mechanism works as follows: commodity prices fall below cost of production. Producers cut investment — mines are placed on care and maintenance, oil rigs are stacked, shipyards cancel orders. Supply starts declining. Eventually demand catches up with the declining supply, prices begin to rise. Prices rise above cost of production. Producers start investing again — new mines are commissioned, new rigs are ordered, new ships are built. Years later, the new supply arrives. If demand has not grown fast enough to absorb it, prices fall again. The cycle repeats.
How Long Does a Commodity Cycle Last?
The full commodity cycle — from trough to trough — typically lasts 7 to 12 years. However, the length varies significantly depending on the commodity and the macro environment. Shipping cycles, where new vessels can be ordered and delivered in 18-36 months, tend to be shorter than mining cycles where supply responses take a decade. Energy cycles sit in between.
Within the main cycle, there are shorter oscillations of 2-3 years driven by inventory cycles, seasonal demand, and geopolitical events. The Hormuz crisis of 2026 is an example of a short-cycle disruption superimposed on a longer structural cycle.
The key insight is that these cycles are predictable in character if not in timing. The pattern always plays out the same way — trough, recovery, boom, bust. The signals that define each phase are consistent across decades and commodity types.
The Four Phases of the Cycle
Phase 1: Trough and Early Recovery
Commodity prices are at or near multi-year lows. Producer earnings are negative or minimal. Balance sheets are stressed. Many companies have cut dividends and are in survival mode. Sentiment is terrible — the financial press is writing about the permanent death of oil, the structural decline of coal, the demise of shipping. This is the most psychologically difficult phase to invest in — but it is the most rewarding.
Indicators: BDI below 1,000, Brent below $50, LME copper below $5,000/t, PMI recovering from a trough, shipping stocks trading below net asset value.
Phase 2: Mid-Cycle Expansion
Prices are rising clearly. PMI is above 50 and improving. Producer earnings are recovering strongly. Dividends are being reinstated. Stocks have moved significantly from their lows but the cycle still has years to run. This is the "hold your winners" phase — the hardest thing here is not selling too early.
Indicators: BDI 1,500-3,000, Brent $60-80, copper $7,000-9,000/t, PMI above 52, shipping stocks generating strong free cash flow.
Phase 3: Late Cycle
Prices are near cycle highs. PMI is peaking or beginning to roll over. New supply is being commissioned at a rapid pace. Producer margins are at record levels but the seeds of the next downturn are being planted. This is the time to systematically reduce exposure — not panic sell, but take profits and reduce concentration in the highest-leverage names.
Indicators: BDI above 3,500, Brent above $90, copper above $10,000/t, shipping orderbook above 15% of fleet, commodity stocks at 10-year high P/E multiples.
The current Signycle cycle score of 76/100 indicates we are in late expansion — meaning most commodity signals are in warn or sell territory.
Phase 4: Contraction
Commodity prices are falling. New supply is arriving. PMI is below 50. Producer earnings are collapsing. Dividend cuts are coming. This is the time to hold cash and wait. The temptation to "buy the dip" is dangerous — commodity downturns can last 2-5 years and produce losses of 50-80% from peak.
The trough (Phase 1) is the best time to buy but the hardest emotionally — everything looks terrible. The late cycle (Phase 3) is the worst time to buy but the easiest emotionally — everything looks great. Disciplined cycle investing requires acting against the prevailing mood.
How to Identify the Phase You Are In
Signycle tracks 18 commodity and macro signals to precisely identify the current cycle phase. Here are the most important:
Brent crude ($107.5/bbl) — the global oil benchmark. Phase 1 buy zone: below $50. Phase 3 sell zone: above $90. Current: sell.
LME Copper ($13213/t) — the global manufacturing health indicator. Phase 1 buy zone: below $5,000/t. Phase 3 sell zone: above $10,000/t. Current: sell.
BDI (2567 pts) — global dry bulk shipping demand. Phase 1 buy zone: below 1,000. Phase 3 sell zone: above 3,500. Current: neutral.
VLCC rates ($495000/day) — crude oil tanker market. Extreme sell zone (Hormuz crisis). Normal sell zone: above $80,000/day.
PMI (51.4) — global manufacturing activity. Recovery from below 48 = Phase 1 buy signal. Above 55 and rolling over = Phase 3 warning. Current: neutral.
EUR 10Y (2.93%) — global interest rates. Rising rates: headwind for commodity demand. Falling rates: tailwind. Current: neutral.
Historical Commodity Cycles
The China Supercycle (2001-2008): China's urbanisation and industrialisation drove the longest and strongest commodity bull market in modern history. Oil went from $18 to $147, copper from $1,400/t to $8,900/t, BDI from 800 to 11,793. The 2008 financial crisis ended it abruptly.
The Recovery and Second Boom (2009-2011): Stimulus packages globally — especially China's $586bn infrastructure programme — drove a rapid recovery. Commodities returned to near-peak levels by 2011 before the European debt crisis and China slowdown ended the move.
The Long Bear Market (2011-2016): The supply investment triggered by high 2007-2011 prices arrived into a slowing demand environment. Brent fell from $115 to $27. Copper fell from $10,000 to $4,300. BDI fell from 11,793 to 290. This was a Phase 4 of extraordinary length and severity.
The Recovery and COVID Disruption (2016-2020): A gradual recovery was cut short by COVID in March 2020, creating the most extreme short-term commodity disruption in history. Oil went negative. Dry bulk hit 400. Then unprecedented stimulus drove one of the fastest Phase 1-to-2 transitions ever seen.
The Post-COVID Bull Cycle (2020-2022): All commodity signals fired simultaneously. Brent recovered from -$37 to $130. Copper tripled. BDI went from 400 to 5,600. Shipping stocks returned 200-400%. This was a textbook Phase 2 cycle — buyers in 2020 were richly rewarded.
The 2026 Hormuz Cycle: A geopolitical shock superimposed on an already late-cycle market. Brent at $107.5 and VLCC at $495000/day are crisis-driven premiums — not structural cycle peaks.
How to Invest Using the Commodity Cycle
The practical application of cycle awareness is straightforward. In Phase 1 (trough): maximum commodity stock exposure, favour highest-leverage names. In Phase 2 (expansion): hold your winners, add on dips. In Phase 3 (late cycle): systematically reduce exposure, take profits. In Phase 4 (contraction): hold cash, wait.
The biggest mistake is chasing the cycle — buying commodity stocks when they are on the front page of every financial publication because they are making record highs. By the time the general public is excited about commodity stocks, the cycle is almost always in Phase 3 or transitioning to Phase 4.
Signycle exists to solve this problem — to give investors an objective, signal-based framework for determining exactly where we are in the commodity cycle at any given moment, across 18 different commodities and macro indicators.
Not financial advice. See disclaimer.