A key unit of Japanese conglomerate SoftBank Group is offering 1 billion of dollar bonds in the unit's first US high-grade deal. SoftBank Corp.'s five- and 10-year notes are set to respectively price 0.9 and 1.10 percentage points above Treasuries, according to a person with knowledge of the deal who asked not to be identified disclosing private details. Those levels are a quarter-point less than revised price talk unveiled early Monday in New York. Each tranche will be 500 million in size, in line with company expectations last week. The money raised would go toward general corporate purposes, the person said, adding that the notes are expected to be rated BBB by S&P Global Ratings and BBB by Fitch Ratings.