Walgreens debuts as dog of the Dow

June 28 (Reuters) - The debut of Walgreens Boots Alliance into the Dow Jones Industrial Average Index this week marks the worst performance of any new entrant in the past 10 years, a Reuters analysis shows.

The announcement that Amazon.com Inc would acquire

online pharmacy PillPack sank shares in Walgreens and other drug retailers on Thursday. Walgreens shares were down more than 11 percent in the three

days after the company replaced General Electric Co in

the index on Tuesday. The No. 2 U.S. pharmacy chain by market cap lost 9.9 percent on Thursday, becoming the day's biggest loser of the 30 stocks that comprise the Dow. It trimmed more than 44 points off the index, which shrugged off early losses to close the day up 98 points, or 0.4 percent. GE shares have risen more than 8 percent since the company was dropped from the Dow, giving it the best three-day performance among those that recently left the index. GE left the Dow with the lowest share price and least amount of influence in the index, which is derived from an average of stock prices among constituent companies. GE said on Tuesday that it would sell its oil-services firm

Baker Hughes and spin off its healthcare business,

leaving a slimmed-down company focused on jet engines, power plants and renewable energy. Eight of the 11 most recent companies to join the Dow have seen share prices decline in the three days following a debut. The second worst performing entrant was Mondelez

International Inc , which saw shares fall 6.8 percent

after joining the index in September 2008 when it replaced

American International Group Inc .

See the attached graphic in related content for the three-day share price performance for companies following a Dow debut in recent years. https://tmsnrt.rs/2Kr8hJk

(Reporting by James Thorne Editing by Marguerita Choy and Alden Bentley)