Why This Coal Miner's Shares Exploded 25% in July

Shares of miner Teck Resources Limited (NYSE: TECK) advanced 25% in July. That's an impressive gain, to be sure, especially for a miner heavily reliant on coal, but to really understand that advance you have to go back to the middle of June, when the company updated its coal production guidance. Between June 16 and the end of July, the stock was up a massive 45% or so.

Teck also produces zinc, copper, and lead, but in recent years volatile coal markets have been the biggest wild card.

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Source: Fool.com