Shares of Green Mountain Coffee Roasters Inc. — described in a Dow Jones report as volatile — slid after the company warned growth is moderating in the coffee industry. Green Mountain expects its sales to be 14 to 18 percent higher in the current quarter; Wall Street is looking for 20 percent. Sales rose 16 percent to $1.34 billion in the latest quarter. Profit was $107.6 million, up from $104.4 million a year earlier.