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* FTSE 100 roughly flat, FTSE 250 up 0.5%
* AstraZeneca up after hiking forecast
* Cobham soars after buyout offer
July 25 (Reuters) - A slew of mixed corporate earnings left
London's FTSE 100 little changed on Thursday, while mid-cap
aerospace firm Cobham surged to a more than three-year high
after a buyout offer.
The main stock market index .FTSE swung between gains and
losses in early deals, and was roughly flat by 0710 GMT, while
the mid-cap FTSE 250 .FTMC outperformed with a 0.5% rise.
AstraZeneca AZN.L added 4% to top the blue-chip index
after it raised its annual product sales forecast, but the gains
were offset by steep, post-earnings losses in spirits company
Diageo DGE.L , analytics provider Relx REL.L and software
provider Sage Group SGE.L . Cobham soared more than 34% to 165 pence, matching the 165
pence per share offer price from U.S. private equity group
Advent International.