Green Mountain's stumbles continue, with news today that chairman and founder Robert Stiller was forced to sell about five million of his shares in the company, a third of his total stake, after getting hit with a margin call.

On the one hand, it's not that surprising; the shares have gotten crushed, down 50% this month. On the other hand, it can't be a good sign for a struggling company when your chairman is so extended he gets hit by margin calls.

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