Macquarie Group Ltd has downgraded these mining stocks despite the commodities rally

The tailwinds lifting the commodity market will likely trigger a raft of earnings upgrades for the resources sector over the coming weeks or months, but this has not stopped Macquarie Group Ltd (ASX: MQG) from downgrading a number of miners this week.

This is despite the broker tipping the resources sector to keep outperforming in 2018 due to resilience in the current spot prices for metals and energy.

It’s really anyone’s guess if spot prices can stay stronger for longer this year as experts remain divided on the prospects for a correction.

However, the broker notes that even with “some level of pullback” in Chinese demand, it still sees material upside to both its forecasts and consensus earnings estimates.

Despite noting the potential bullish outcome for the sector, Macquarie has taken a more conservative approach and made modest upgrades to its commodity price estimates. This in turn has led to an increase in its price targets of less than 10% for many resources stocks under its coverage.

What this means is that there is plenty of room for further upgrades this year if commodities continue to defy the sceptics.

But this isn’t enough to keep some of the more popular resources stocks on the broker’s “buy list”. Macquarie has downgraded lithium and potash miner Orocobre Limited (ASX: ORE) to “underperform” from “neutral” following its 71% rally over the past 12-months.

Fellow lithium miner Neometals Ltd (ASX: NMT) has also hit with a downgrade with the stock being cut to “neutral” from “outperform” on valuation grounds.

A number of high flying gold stocks suffered a similar fate. Evolution Mining Ltd (ASX: EVN), St Barbara Ltd (ASX: SBM) and Saracen Mineral Holdings Limited (ASX: SAR) were cut to “neutral” from “outperform” by Macquarie.

It may be time to take some profit off the table before the February reporting season.

But this doesn’t quite apply to mining giant BHP Billiton Limited (ASX: BHP), according to Macquarie. It is expecting the miner to announce a surprise capital return when it hands in its results next month.

Further, BHP has the most potential upside from upgrades over the next two years when compared with Rio Tinto Limited (ASX: RIO) or South32 Ltd (ASX: S32).

But before you buy another stock, you should read the free report prepared by the experts at the Motley Fool on another sector that is primed to outperform this year. Click on the link below for more details.

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Motley Fool contributor Brendon Lau owns shares of BHP Billiton Limited, Macquarie Group Limited, Rio Tinto Ltd., and South32 Ltd. The Motley Fool Australia has no position in any of the stocks mentioned. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.

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