Mining Supply and Long Term Metal Prices

Every ounce of gold and silver ever mined still exists, more or less, and the stock above ground is many times larger than a year of new mine output. That fact shapes how supply affects price: for the metals, supply is about the stock already held, not the flow from mines. Mining supply still matters, but over years rather than months, and in ways that are easy to misjudge.

The flow and the stock

New mine production adds a small percentage to the above-ground stock each year. Recycled metal adds a little more. Compared with the amount that changes hands on exchanges in a single day, this is tiny. A strike at a large mine or a new discovery therefore does little to the price in the short term. What moves gold and silver over months is the willingness of existing holders to buy or sell, which is driven by real yields, the dollar and sentiment.

Where supply does matter

• Over years, a sustained fall in mine output tightens the market slowly and supports prices once demand recovers
• Mining costs set a rough floor: when prices fall below the cost of the higher-cost mines for long enough, output falls and the market tightens
• For silver, a large share of supply is a by-product of mining other metals, so silver output depends on the economics of copper, lead and zinc rather than on silver prices
• Exploration spending follows prices with a lag of years, so a long bear market plants the seeds of the next shortage

Reading the data

Annual supply and demand reports from industry bodies are the main source. They show mine output, recycling, jewellery demand, investment demand and official purchases. The investment and official lines move the price; the mine and jewellery lines describe the backdrop. A trader who reads the report should focus on the direction of investment flows and treat the supply figures as context.

The common mistake

Forecasting a price move from a mine supply change is the most common error in metals commentary. A large mine opening or closing makes headlines, but the market absorbs it within the day.

What to watch

Watch the trend in mining costs relative to the price, the by-product dynamics for silver, and the investment demand lines in the annual reports. Reserve the supply story for the long-term view and let real yields and the dollar drive the trading decisions.