from the prices at the close of the market for the day.

Changes in the index's composition are rare, and generally occur only after corporate acquisitions or other dramatic shifts in a component's core business. Should such an event require that one component be replaced, the entire index is reviewed.

As of 06 2026, the index consists of the following 20 companies:

Alaska Air Group replaced AMR Corporation on December 2, 2011, after AMR corp. filed for bankruptcy protection.

Effective

1.Previous
3.Next