** Shares of RateGain Travel Technologies Ltd RATE.NS rise as much as 5.4% to 480.5 rupees ** IT co says Tunisair extends partnership with co for three more years** Adds, deal builds on two-year collaboration with AirGain, co's pricing intelligence platform** Stock on track to snap 3 months of losses; gained 2.5% so far in April** More than 413,000 shares traded as of 2:49 p.m. IST, more than their 30-day moving avg of 367,551 shares** Mean rating by analysts on stock is 'buy'; median PT is 700 rupees - data compiled by LSEG ** RATE last up 4.5%, cutting YTD losses to 37.1%

(Reporting by Meenakshi Maidas in Bengaluru)

((meenakshi.maidas@thomsonreuters.com))