PTT, Thailand's largest integrated petroleum company, made its bond market debut on Thursday pricing a $400 million 10-year deal via Citigroup, Deutsche Bank and JPMorgan. The Baa1/BBB sovereign rated deal was priced at 99.121% on a coupon of 5.75% to yield 5.867%. This equated to 138bp over Treasuries, or 90bp over Libor.