More U.S. workers filed first-time unemployment insurance claims last week, boosting claims above a 4-week moving average, a sign that the labor market may still be facing instability.

For the week ending June 20, intial claims were 627,000, up 15,000 from the previous week’s revised figure of 612, the Labor Department reported today.

The four week moving average was 617,250, up 500 from the previous week’s revised average of 616, 750

The advance number for seasonally adjusted insured unemployment in the week ending June 13 was 6,738,000, up 29,000 from a week earlier revised level of 6,709,000.

Social Security Unemployment