“Higher rates already are crimping financing for heavily-indebted companies such as Dunn Paper, a maker of specialty paper in Port Huron, Mich., which missed an interest payment at the end of March. The total value of debt considered “distressed” by S&P Global Ratings has nearly doubled over the past month to $49 billion, including securities from companies such as Rite Aid and Bed Bath & Beyond, as investors demand higher yields from such risky issuers.”