If you'd invested in: Premier Oil and Petra Diamonds

Premier Oil has seen its share price rise in step with its output and profits, while Petra Diamonds' profit warning has seen the shares slide.

If only...

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Be glad you didn't buy...

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Petra Diamonds (LSE: PDL) is a mining group focused on the exploration and mining of diamonds in Africa. Its shares plunged in September after Tanzania's government said it was investigating the country's diamond sector, leading Petra to suspend operations at one mine. The shares fell again in January when the firm released a profit warning. Last month, Petra announced a rights issue that will see it raising £133m from shareholders to pay down debt (it stood at $622m in April). The figure has soared due to the rising value of the South African rand against the US dollar.

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Alice grew up in Stockholm and studied at the University of the Arts London, where she gained a first-class BA in Journalism. She has written for several publications in Stockholm and London, and joined MoneyWeek in 2017.