Morning Market Losers By: Benzinga via Benzinga September 22, 2015 at 10:06 AM EDT Arch Coal Inc (NYSE: ACI) shares dropped 10.42 percent to $3.18. Tribune Publishing Co (NYSE: TPUB) shares fell 7.66 percent to ... Read More >> Related Stocks: Ambarella Inc ConAgra Foods Darden Restaurants Freeport-McMoRan Gopro Inc Cl A Teck Cominco Limited