S&P Dow Jones Indices announced that Apple (AAPL) will be added to the Dow Jones Industrial Average, replacing AT&T (T), after the close of business on March 18, 2015; release attached.

All data is based on last night’s close, and will be finalized after the close of March 18, 2015. 

American Telephone & Telegraph was added to the Dow Jones Industrials on October 4, 1916.  It was rename AT&T on April 20, 1994, and deleted from the Dow on April 8, 2004.  On November 1, 1999, SBC Communications, which formerly was Southwestern Bell, one of the seven ‘baby bells’ spun-off by AT&T in 1982 (Ameritech, Bell Atlantic, BellSouth, NYNEX, Pacific Telesis, Southwestern Bell, and US West – all 7 were added to the S&P 500), was added to the Dow.  On November 21, 2005 AT&T merged into SBC Communications, with SBC Communications renaming itself AT&T, which is the issue being removed now. After the change, Verizon, which was also one of the original seven spun-off, Bell Atlantic, will be the only telecommunications issue left in the Dow.

The change in membership will occur as Visa does a 4-for-1 stock split, which will have an impact on the index since the Dow is price weighted.  Overall, the changes will reduce the weighting of information technology from 19.17%, down to 17.05%, since Visa’s 4-for-1 stock split outweighs Apple’s addition (even as the full market value weighting, such as the methodology used for the S&P 500, will change information technology’s market value to 30.92% of the Dow’s market weight, from the current 19.71%). Telecommunication’s index weight will be reduced to 1.80%, from the current 2.94%, as Verizon becomes the only issue representing the sector in the Dow.

As of last night’s close (3/5/15), the split, combined with the membership change, will reduce Visa’s position in the price-weighted index from #1, at their current $274.13 price, to #21, at $68.53, reducing its weighting percentage from 9.71% to 2.53%.  Goldman Sachs will be take over the #1 weighting position with 7.01% of the weighting, followed by 3M (6.18%), International Business Machines (5.95%), and Boeing (5.70%).  Apple will enter the index in the 5th position, accounting for 4.66%, even as it is the largest publicly traded issue by market value in the world (all subject to change based on the March 18 close).

Visa has been the best performing issue in the Dow since the close of 2013, accounting for approximately 21% of the gain.  To some degree, the impact on the Dow of the split is similar to profit taking, since the gains were locked in and the issue reweighted; at the new weighting, Visa would need to decline 75% in price to negate the 21% gain it added to the Dow since 2013.

Splits in the Dow have been rare (as they have for the S&P 500 and the market in general), with the last stock split in the Dow being a 2-for-1 by Coca-Cola in August 2012, and the one before that being a 2-for-1 by Caterpillar in July 2005; I went back to 1980, but didn’t find a 4-for-1 in the Dow (S&P 5000 members salesforce.com and VF Group did a 4-for-1 in 2013).  Technically, Visa’s 4-for-1 stock split will not count as a Dow split, since it occurs before the addition.

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