of Navistar International Corp. stock totaling more than 48 million shares traded on the New York Stock Exchange today, dwarfing all other big trades ever handled in the United States.</br></br>An exchange spokeswoman said the Navistar block of 48,788,800 shares set an NYSE record in both volume and value. Each Navistar share fetched $10, bringing the total value of the transaction to $487.9 million.</br></br>Navistar formerly was known as International Harvester Co. but changed its name after selling its farm-equipment operations to concentrate on producing big trucks.</br></br>The previous record NYSE block trade occurred on June 21, 1984, when a 10-million-share chunk of Superior Oil Co. stock sold for $42,375 a share, or $423.75 million. It was bought by Mobil Corp. as part of MobilÛªs $5.7 billion acquisition of Superior.</br></br>NEW YORK, April 10ÛÓThe stock market pushed ahead for the third straight session today, aided by hopes for still-lower interest rates.