Share your opinion and earn yourself a free Motley Fool premium report!

We are looking for Fools to join a 75 minute online independent market research forum on 15th / 16th December.

To find out more and express your interest please click here

Is one of these stocks the best mining buy on the market?

Should you pay up for proven performance or take a cheap bet on future gains?

| More on:

The content of this article was relevant at the time of publishing. Circumstances change continuously and caution should therefore be exercised when relying upon any content contained within this article.

You’re reading a free article with opinions that may differ from The Motley Fool’s Premium Investing Services. Become a Motley Fool member today to get instant access to our top analyst recommendations, in-depth research, investing resources, and more. Learn More.

Shares in diamond miner Petra Diamonds (LSE: PDL) edged higher on Monday morning after the group said that profits rose by 12% to $66.8m during the year ending 30 June. Production rose by 16% to 3.7m carats, slightly ahead of Petra’s previous guidance.

Capital expenditure rose to $324.1m, as activity peaked on expansion projects at the Finsch and Cullinan mines. Both of these projects are expected to deliver more than 1m tonnes of ore in the current financial year, boosting both cash flow and profits.

Indeed, while Petra shares trade on a trailing P/E of about 16, current broker forecasts indicate that Petra’s profits could double this year. This puts the stock on a forecast P/E of just 8. If the firm can deliver on its promises and the diamond market remains stable, the shares could be cheap at current levels.

However, before you hit the buy button on Petra, it’s worth remembering that the firm’s expansion is being funded by debt. One consequence of this is that Petra wasn’t allowed to declare a final dividend for last year.

Its net debt rose by 124% to $384.8m last year. This sharp rise in debt wasn’t matched by a corresponding rise in earnings and means that Petra didn’t satisfy the dividend conditions imposed by its lenders.

Although Petra is still complying with the other covenants relating to its loans, these have already been relaxed once. These revised covenants are only temporary, so Petra is now under pressure to deliver improved performance over the next 12 months.

I think the shares’ low forecast P/E makes sense at this point. I rate Petra as a hold, until the benefits of recent investment start flowing through to the firm’s financial results.

Bigger might be better

In contrast to Petra, iron ore and copper giant Rio Tinto (LSE: RIO) has no issues with debt. The group’s net debt has fallen by nearly a third since peaking in 2012, and profits are expected to bounce back strongly this year.

Rio shares currently trade on a forecast P/E of 15 and offer a prospective yield of 3.7%. This payout is expected to remain flat in 2017, as earnings growth slows to about 7%.

However, Rio’s two main commodities, iron ore and copper, are both in the middle of a prolonged downturn. It’s worth remembering that this won’t last forever — and when market conditions improve, Rio’s large-scale, low-cost assets will mean that profits should rise fast.

City analysts are also turning steadily more positive on Rio. Earnings forecasts for 2016 have risen from a low of $1.29 per share in February to $1.92 per share today. These forecasts tend to lag events, so a trend of rising forecasts is often a sign that further gains are likely.

In my view, Rio offers good long-term potential for both income and steady growth. Indeed, I rate Rio as one of the best big-cap buys in the mining sector. I believe this stock could well beat the wider market over the next few years.

Roland Head owns shares of Rio Tinto. The Motley Fool UK has recommended Rio Tinto. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors.

More on Investing Articles

Thoughtful man using his phone while riding on a train and looking through the window
Investing Articles

Here’s how much passive income someone could earn maxing out their ISA allowance for 5 years

Christopher Ruane considers how someone might spend a few years building up their Stocks and Shares ISA to try and…

Read more »

Man putting his card into an ATM machine while his son sits in a stroller beside him.
Investing Articles

Was I wrong about Barclays shares, up 196%?

Our writer has watched Barclays shares nearly triple in five years, but stayed on the sidelines. Is he now ready…

Read more »

Wall Street sign in New York City
Investing Articles

Up 17% in 2025, can the S&P 500 power on into 2026?

Why has the S&P 500 done so well this year against a backdrop of multiple challenges? Our writer explains --…

Read more »

National Grid engineers at a substation
Investing Articles

National Grid shares are up 19% in 2025. Why?

National Grid shares have risen by almost a fifth this year. So much for it being a sleepy utility! Should…

Read more »

Road 2025 to 2032 new year direction concept
Investing Articles

Here are the potential dividend earnings from buying 1,000 Aviva shares for the next decade

Aviva has a juicy dividend -- but what might come next? Our writer digs into what the coming decade could…

Read more »

Person holding magnifying glass over important document, reading the small print
Investing Articles

Just released: our top 3 small-cap stocks to consider buying in December [PREMIUM PICKS]

Small-cap shares tend to be more volatile than larger companies, so we suggest investors should look to build up a…

Read more »

This way, That way, The other way - pointing in different directions
Investing Articles

Is the unloved Aston Martin share price about to do a Rolls-Royce?

The Aston Martin share price has inflicted a world of pain on Harvey Jones, but he isn't giving up hope…

Read more »

Surprised Black girl holding teddy bear toy on Christmas
Investing Articles

How much do you need in a Stocks and Shares ISA to raise 1.7 children?

After discovering the cost of raising a child, James Beard explains why he thinks a Stocks and Shares ISA is…

Read more »