The one thing the article fails to mention is that the addition of Apple will coincide with a 4:1 stock split in Visa[0]- the index's highest priced (and thus highest-weighted) holding.
Although the addition of Apple had been anticipated, Visa's split was definitely a catalyst. Had they not added Apple, the technology sector within the index would have dropped significantly, in line with Visa's split. The addition of Apple will minimize the impact.
0.http://neworleanscitybusiness.com/blog/2015/03/06/visa-stock...