PHILADELPHIA--(BUSINESS WIRE)--Radian Group Inc. (NYSE: RDN) announced today that it has priced its underwritten public offering of its senior unsecured notes due 2020 and increased the size of the offering from $300 million aggregate principal amount to $350 million aggregate principal amount (the “Offering”). Goldman, Sachs & Co., BofA Merrill Lynch and Deutsche Bank Securities are acting as book-running managers for the Offering. The Offering is expected to close on June 19, 2015, subjec