Anglo American has said it may bid for Sirius Minerals' potash project under the North York Moors National Park. Picture: Joy Global Inc
Anglo American has said it may bid for Sirius Minerals' potash project under the North York Moors National Park. Picture: Joy Global Inc

Anglo American is dabbling in creative mergers & acquisitions. Buying an English fertiliser project for just over $500m (R7bn), excluding debt, is more than manageable for a $35bn mining giant that generated $1.3bn in free cash flow in the first half of last year. It's also a gamble on an unproven niche market that speaks to the paucity of large-scale acquisition options for cashed-up diggers.

Anglo said last week it may bid for London-listed Sirius Minerals, owner of a giant potash project under the North York Moors National Park.

The mine's future has been in question since a funding plan collapsed last year, after Sirius had to pull a $500m junk bond sale, making it impossible to unlock a $2.5bn credit facility from JPMorgan Chase & Co.

That makes this an opportunistic move by Anglo CEO Mark Cutifani. Anglo is offering 5.5p (R1) per share for a stock that traded at four times that less than a year ago. It's an affordable option - Anglo can easily support both the cost of the initial deal and a development spend estimated at $300m a year for the next two years.

It's a laudable effort at diversification too, away from SA, into a counter-cyclical commodity and a space the miner hasn't been in since selling its niobium and phosphates business in Brazil in 2016. It's also purchasing at a relatively low point for fertiliser ingredients - notable for an industry that in the past burnt billions buying at the top.

But none of this means Anglo should press ahead with a firm offer.

Anglo shareholders still bear bruises from its disastrous, peak-of-the-market Minas Rio deal - a Brazilian iron ore project that was plagued by years of cost overruns and delays, and ultimately contributed to the departure of Cutifani's predecessor. The $5bn Quellaveco copper mine in Peru, meanwhile, which was supposed to prove Anglo's ability to build from scratch, is still two years from production.

Anglo argues that the Sirius development is far more advanced than Minas Rio was. That's true. But it will still require about $3bn, by Sirius estimates, and a 37km tunnel under a national park, for a conveyor belt to take rock to port. A challenge, even with permits in hand.

Investors should be far more worried about Anglo bosses' willingness to bet on a project where demand for the end product - an alternative to traditional potassium-bearing minerals called polyhalite - is unproven, and prices are unclear. The selling point is that along with potassium it combines several key nutrients - magnesium, sulphur and calcium -and is low-chloride too, which matters for some crops. It's unclear how those extras are valued, though.

Only one company, Israel Chemicals, currently produces polyhalite, from one mine. Price estimates range from $100 to $200 per metric ton, making the economics difficult to calculate. Polyhalite accounts for a tiny sliver of the wider potash market.

Capacity of the Yorkshire mine dwarfs current demand. The polyhalite market amounts to less than 1-million tons a year, but the Yorkshire mine could produce 13-million tons. That's a mighty step up, even accounting for the purchase agreements Sirius has already signed. Success will require building substantial new demand and clawing market share away from potash giants like Nutrien. That may be a challenge.

There is some element of reassurance here. Even if it bids, Anglo won't be committing to develop the mine, making this an option of sorts.

That's small consolation for investors, though, who will fret that cash-rich miners looking for growth - and wary of overspending on coveted metals such as copper - will begin to experiment. Expect mixed results.


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