Puerto Rico postponed until later this week its first bond sale in public markets since it defaulted, investors said on Tuesday, an offering that according to Fitch ratings agency may attract high-yield municipal funds. According to data company IPREO, the $750 million deal for the Puerto Rico Aqueduct and Sewer Authority (PRASA) was slated to price on Tuesday. Lyle Fitterer, head of tax-exempt fixed income at Wells Capital Management, also said that it was his understanding that the release would happen Thursday.