A combination of Bs -- anti-Bs oscillation results from D0 based on a 1/fb data sample is 
reported. A 95% C.L. lower limit on the oscillation frequency of 15.0/ps is set. The 
corresponding expected limit is 16.5/ps.

The combined likelihood curve has a preferred value of 19/ps, with a 90% C.L. interval of 
17--21/ps. The probability for a background fluctuation to give a similar result is about 
8%.