NEW YORK--(BUSINESS WIRE)--The recent downgrade of Petroleos de Venezuela, S.A. (PDVSA) puts the 'CCC' and lower rated pool for energy at 22% compared to 18% for the overall high yield (HY) market and up from 13% one year earlier, according to Fitch Ratings. The sector's historical default rate was a benign 1.9% over the past 35 years and finished at 0.7% in 2014, but we expect the energy default rate to rise in the next couple of years with crude oil prices at nearly six-year lows that will li