Beyond the headline grade: How to weigh every type of junior mining news

Kitco Media
By Marcel Nally
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Beyond the headline grade: How to weigh every type of junior mining news teaser image

Two gold explorers report results on the same morning. The first announces a narrow, high-grade intercept from a single early hole, drilled well away from anything else on the property. The second reports a wider, lower-grade interval from an infill program designed to firm up ounces it already believed it had. The first release gets picked up everywhere. The second may have done more to reduce the project's risk.

A headline grade can't tell you which company moved forward. Neither can any other single number, and grade is only one of the things juniors announce. In a given quarter the same company may issue drill results, a resource update, metallurgical test work, an economic study, a permit, a financing, and a partnership. Each is a different kind of news, and each needs a different question asked of it. After 30 years of reading these releases, I work from a short framework. Here it is.

Four questions for every announcement

Whatever the type of release, I ask the same four things.

What happened, and does it help or hurt the case? A good result can still be a neutral one. A strong intercept inside an area the resource already covers adds less than a modest one that opens new ground.

Does it matter? Separate the developments that could change how a project is valued from routine activity. Most of a junior's news flow is the second kind.

Is the evidence good enough for the claim being made? This is where true width, the qualified person's sign-off, the lab, and the blanks, standards, and duplicates behind the assays come in. A conclusion is only as strong as the work underneath it.

How current is it? A resource estimate from a decade ago, or drill results three years old, shouldn't carry the weight of work completed this year.

Drilling and resources: what the rock supports

Grade multiplied by width flags an intercept worth a look, but it doesn't say what kind of deposit you have. A narrow vein and a broad porphyry can produce the same grade-thickness number and imply completely different mining methods and economics. So ask what the program was designed to test, how the result fits with the holes around it, and whether it changes the resource model or leaves it where it was.

Resource updates deserve the same treatment. Look at the confidence categories, the cut-off grade, and how much of the change came from new drilling rather than a revised interpretation or a lower cut-off. An increase in ounces that rests on a lower cut-off is a different thing from one earned with the drill.

Metallurgy and economics: what the numbers assume

A recovery figure means little without the scale and the sample behind it. Bench tests on one composite are a starting point. Pilot work across several parts of the deposit tells you much more, because ore doesn't behave the same everywhere. Check for penalty elements too, the impurities that cost money at the smelter.

Economic studies come in grades of confidence. A preliminary economic assessment can lean on inferred resources. A pre-feasibility or feasibility study cannot, and the cost estimates tighten at each step. Net present value and internal rate of return depend on the metal price, capital cost, and operating cost assumptions underneath them, so read those first. All-in sustaining cost is useful, but only as reliable as the assumptions it was built on.

Permits, partners, and money: what has to go right outside the rock

Permitting news is easy to misread. "Application submitted," "permit received," and "central approval granted" are three different events, and a positive announcement can leave the approval that matters most unresolved. Jurisdiction shapes the timeline as much as geology does. A deposit that could be permitted in a reasonable period in one place can take far longer in another.

Partnership news carries the same risk. A memorandum of understanding is usually non-binding. A definitive agreement with named terms and payments is a different document altogether. A financing can extend a company's runway while diluting everyone already holding shares, so look at the size, the price, and whether the money funds the work plan the company has already described.

Construction and production updates should be read against the study that justified them: schedule, capital cost, and ramp-up compared with what was promised.

When the story outruns the evidence

I find it useful to keep two columns, one for what the disclosed evidence supports and one for how the company is presenting it. Take a "transformational" drill result. The evidence column might hold a high-grade interval, an uncertain true width, limited continuity, and no change to the resource model. The presentation column holds the adjective. When the second column is running well ahead of the first, that is a reason to look harder.

It works in reverse as well. A methodical infill program or a modest-sounding metallurgical update can reduce development risk a great deal without producing an exciting headline. A gap between narrative and evidence doesn't tell you whether a stock is cheap or expensive. It tells you where to spend your reading time.

None of this replaces the technical report, which is where the full numbers live. The framework is a way to decide what each announcement is supposed to prove, check whether it does, and find the next question worth asking. Companies that disclose well make that easy, and the ones that don't tend to show it quickly.

Disclosure: Marcel Nally is the founder of Minestarters, which built Atlas, a research tool that filters and tags junior mining news releases by commodity, jurisdiction, and event type. Atlas is currently in beta. This article is commentary and does not constitute investment advice or a recommendation.

Kitco Media

Marcel Nally

Marcel Nally is a geologist with over 30 years of experience working with junior mining and start-up mining exploration companies. He's the founder of Moxico Resources (valued at over $2 billion), and is currently a founder at Minestarters, where the team has built ATLAS, a mining intelligence platform. He is also the writer of the book "The 8 Pillars of Starting a Mining Company".

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