The Dow is due for a change. These sectors may be affected.

The keepers of the Dow Jones Industrial Average will have to make at least one change to the venerable index next week, and there’s a very good chance they’ll make a couple of others, as well. S&P Dow Jones Indices will have to tweak the Dow DJIAon Feb. 26, the day Walmart Inc.’s WMT, +3.55%three-for-one stock split takes effect. Before Walmart’s stock split, the company, which reported fourth-quarter earnings on Tuesday, was the 17th largest component of the Dow. The