S&P Global Ratings expects US$1.1 trillion of rated Asia-Pacific financial and non-financial corporate debt to mature from the second half of 2017 through 2022, about 11 per cent of the total maturing globally, said an article published yesterday by S&P Global Fixed Income Research, titled "Asia-Pacific Refinancing Study--$1.1 Trillion Of Rated Corporate Debt Is Expected To Mature Through 2022."