The bond risk of ANA Holdings Inc. rose the most of any company in Japan as the spread of Ebola to two health workers in the U.S. rekindled memories of the severe acute respiratory syndrome (SARS) epidemic in 2002 and 2003.

The cost to insure the debt of the airline from nonpayment jumped 30 basis points to 133 basis points in the five days to last Friday, its biggest weekly increase in two years, data provider CMA reported.

Protection on United Airlines Inc. widened 46 points in the same period to 348, the sharpest weekly advance since June 2012. The average of 12 global carriers was 284 basis points, CMA data show.