ONGOING INVESTIGATION ALERT: The Schall Law Firm Announces it is Investigating Claims Against Glencore plc and Encourages Investors with Losses in Excess of $100,000 to Contact the Firm LOS ANGELES, Dec. 13, 2018 (GLOBE NEWSWIRE) -- The Schall Law Firm, a national shareholder rights litigation firm, announces that it is investigating claims on behalf of investors of Glencore plc...