It's a rough time to be in the coal business these days. One company just gave up on trying to sell some of its coal holdings after it failed to find a buyer. This doesn't bode well for others in that space. 

A stranded asset is something that is worth less on the market than it is on a balance sheet. Could that be what's happening to coal? Watch this video to hear more about what's going on with this ubiquitous fuel source.

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