I Roundup_______________________________  
Standard & PoorÛªs Corp. yesterday put U.S. Steel Corp., the nationÛªs No. 1 steel maker, and its Marathon Oil Co. subsidiary on ÛÏcreditwatchÛ with negative implications.</br></br>A spokesman for the rating agency said the move ÛÏmeans that thereÛªs the potential for the bond ratings of both companies to be lowered.Û S&PÛªs creditwatch alerts investors to events or developments that could lead to rating changes.</br></br>S&P said it took the action because U.S. Steel has indicated it plans to embark on a major plan to restructure and downsize its steel capacity. Such a program would entail large write-offs and plant closings, which would have a cash impact on severance costs and funding needs for pension obligations, the agency said.</br></br>U.S. SteelÛªs senior debt is now Triple B plus, which still is an in-vestment-grade rating. MarathonÛªs senior debt also is Triple B plus.</br></br>A group of New York investors has bought the Frederick Towne Mall in what officials believe may be the largest real estate transaction in Frederick County history.