Looking at the universe of stocks we cover at Dividend Channel, on 5/20/15, Hecla Mining Co. (HL - Get Report), Griffon Corp. (GFF), and Schweitzer-Mauduit International, Inc. (SWM) will all trade ex-dividend for their respective upcoming dividends. Hecla Mining Co. will pay its quarterly dividend of $0.0025 on 6/1/15, Griffon Corp. will pay its annual dividend of $0.04 on 6/25/15, and Schweitzer-Mauduit International, Inc. will pay its quarterly dividend of $0.38 on 6/26/15.As a percentage of HL's recent stock price of $3.22, this dividend works out to approximately 0.08%, so look for shares of Hecla Mining Co. to trade 0.08% lower — all else being equal — when HL shares open for trading on 5/20/15. Similarly, investors should look for GFF to open 0.24% lower in price and for SWM to open 0.90% lower, all else being equal. Below are dividend history charts for HL, GFF, and SWM, showing historical dividends prior to the most recent ones declared. Hecla Mining Co. (HL - Get Report):
Griffon Corp. (GFF):
In Monday trading, Hecla Mining Co. shares are currently off about 0.9%, Griffon Corp. shares are up about 0.7%, and Schweitzer-Mauduit International, Inc. shares are off about 0.5% on the day.