Mattel Shares Slashed To Sell At Argus By: Benzinga via Benzinga April 21, 2015 at 10:04 AM EDT In a report published Tuesday, analyst John Staszak of Argus downgraded Mattel, Inc. (NASDAQ: MAT) from Hold to Sell. The fair value was ... Read More >> Related Stocks: Hasbro Mattel Walt Disney