Molycorp (NYSE: MCP) is rapidly increasing production but the company is still losing money on rare-earth minerals. The big question for investors is: What will happen to prices and profits when production goes from 7,000 metric tons to 40,000 metric tons? The Motley Fool's Erin Miller sat down with Fool.com contributor Travis Hoium to see why he still doesn't see a reason to buy the stock even though production is picking up.