Shares of some top staffing companies are down at 10 a.m.:

Kelly Services Inc. class A fell $.49 or 2.8 percent, to $16.79.

Korn/Ferry International Inc. fell $.65 or 2.2 percent, to $29.30.

ManpowerGroup fell $1.51 or 1.8 percent, to $81.60.

Robert Half International Inc. fell $.78 or 1.6 percent, to $47.56.