US ISM Services Eases to 53.6, Prices Index Holds Near Multi-Year High.US ISM Services PMI edged down from 54.0 to 53.6 in April, slightly missing expectations of 53.8 but still remaining above the 12-month average of 52.5, indicating continued expansion in the sector. Fourteen industries reported growth, one more than in March, while the number of industries in contraction held steady at three, pointing to a broadly resilient services economy.