 Shares of Steel Dynamics Inc. STLD, -8.99 bounced 4.6 in premarket trading Thursday, after the steel producer and metals recycler provided a third-quarter profit outlook that was above expectations, citing historically strong steel operations. The upbeat outlook comes a day after the stock tumbled 9.0, after fellow steel producer Nucor Corp. NUE, -11.31 issued a profit warning, as weakness in its steel mills business offset strength in steel products. 