SECURITIES

Salomon’s Shopkorn Resigns: Salomon Bros. said Stanley B. Shopkorn, one of Wall Street’s most powerful traders, has resigned as head of the firm’s stock division, effective at year-end. He had held the post since 1982. The resignation marks another major break with Salomon’s past engineered by interim Chairman Warren E. Buffett, the Omaha investment guru who took over in August after the firm admitted repeated violations of Treasury market rules. While no reason was given for Shopkorn’s departure, a published report said he was to be excluded from the new executive committee appointed by Salomon’s chief operating officer, Deryck C. Maughan.