NY -- Standard&Poor's CreditWire 8/10/98 – Standard&Poor's today assigned its single-'A'-minus rating to New York City's G.O. bonds as follows: -- $400 million G.O. fiscal bonds series 1999C due Aug. 1, 2028; -- $6.59 million taxable fiscal bonds series 1999D due Aug. 1, 2000 -- $122.78 million G.O. bonds series 1999D due Aug. 1, 2019. The bonds are scheduled to sell Aug. 11, 1998. At the same time, Standard&Poor's today affirmed its ratings on New York City's approximately $27 billion in outstanding debt (see list below). The rating reflects: -- Improved financial performance. The city has produced recent budget surpluses, demonstrated willingness to curtail expenditure growth, and reduced the out-year gaps. In addition, the