* To replace Banesto in Spanish blue chip index on Jan. 3
* Amadeus shares end up 3.05 percent before announcement
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MADRID, Dec 9 (Reuters) - Travel firm Amadeus will join Spain's blue chip index from Jan. 3, the stock market's advisory committee announced on Thursday, five years after a private equity buyout which delisted the company.
Amadeus, which returned to the stock market last April, will replace Spanish bank Banesto on Spain's leading stock market index.
Its shares closed up 3.05 percent at 15.56 euros before the announcement, while Banesto ended down 0.38 percent at 6.5.
The company was widely favoured by analysts to join the index following the committee's quarterly revision. (Reporting by Tracy Rucinski; Editing by Jon Loades-Carter)