International ratings service Standard & Poor's (S&P) has assigned a preliminary single-'A' rating to food giant Campbell Soup Co.'s US$1bn Rule 415 shelf registration. S&P affirmed its single-'A' long-term and its 'A-1' short-term corporate credit ratings for the Camden, N.J.-based company. The outlook is negative. About US$3.6bn of total debt was outstanding at 28 April 2002.