** Perion Network shares PERI.O fall 38% to $13.14
premarket after software firm trims FY outlook
** If losses hold through open, stock to open at over
three-year low
** Co sees FY rev. in range of $590 mln to $610 mln, down
from $860 mln to $880 mln forecast earlier
** PERI also trims core annual earnings forecast
** Co's preliminary Q1 results show core earnings declined
36% year-on-year
** PERI says changes in ad pricing on Microsoft Bing in Q1
hurt search volume and revenue
** Co to increase annual share buyback up to $75 mln, from
previously announced up to $50 mln
** Up to last close, stock had fallen 32% YTD
(Reporting by Johann M Cherian in Bengaluru)
((johann.mcherian@thomsonreuters.com;))