The appetite for bonds sold by companies in issues in their own names is getting so strong that even a BBB- rated issue saw stronger than usual demand. The financing arm of Dampier Bunbury Natural Gas Pipeline announced a minimum size of $200 million but managed to sell nearly three times, at $550 million. It was a mix of fixed-rate and floating-rate bonds and was priced at a yield of around 300 basis points more than swap. This was the largest bond sale by a non-financial borrower since Reliance Rail Finance's $1.9 billion note issue in February 2007.Real estate group Mirvac also had success with its six-year note issue, with strong demand resulting in upsizing of the A$150 million issue to A$200 million. The company managed to achieve a pricing of 250 points over swap, which was better than the 265-basis-point spread it achieved for a five-year issue in March.In ratings action, Asciano's US$1 billion bond issue received an upgrade from Moody's, who rated it as Baa2 though S&P kept its BBB- rating intact for the same issue. The upgrade should help the company achieve better pricing for the rest of its debt refinancing plans.According to reports, Dalrymple Bay Coal Terminal may be getting set for a local bond issuance, with the company holding a site visit for bond investors next month.Another infrastructure company issue is likely from Sydney Airport, which may be planning to raise funds overseas to refinance debt, with around A$1.4 billion of bonds due to mature over 2011 and 2012.In the international market, Microsoft sold US$4.75 billion of senior unsecured notes, which consisted of $1 billion of 2013 bonds sold at a coupon of 87.5 basis points and which was reportedly the lowest US corporate borrowing rate on record. The rate is even less than the rate that a government-insured savings account offers.