Credit Debt Repair

Norfolk Southern Corp. offered the first 100-year bonds since 2005, boosting sales of debt maturing in 10 or more years to $43.7 billion this month, or 48.7 percent of all offerings, according to data compiled by Bloomberg. Investment-grade debt yields fell to 3.79 percent on Aug. 19, according to Bank of America Merrill Lynch Index data, the lowest on record.