NY û Standard & Poor's CreditWire 1/22/98 -- Standard & Poor's today affirmed its triple-'B' corporate credit and senior secured and unsecured debt ratings on Union Pacific Corp. and subsidiaries, its 'A-2' commercial paper and short-term corporate credit rating on Union Pacific Corp., and its single-'A' rating on the equipment trust certificates of subsidiary railroads (see list below). The outlook remains negative. Union Pacific Corp. today announced a loss of about $150 million for the fourth quarter of 1997 as a result of reduced revenues and higher expenses related to serious, persistent congestion on portions of the merged Union Pacific-Southern Pacific railroad. During 1997 a combination of several factors including crew shortages at Southern Pacific and strong volumes led to
