Updates
** Mexican-themed fast-food chain Guzman y Gomez GYG.AX slips as much as 4.6% to A$25.180, posting its biggest intraday pct loss since August 28
** Morningstar notes GYG's A$100 mln ($65.49 mln) share buyback with share price trading over A$26
** Investment research firm highlights how GYG issued shares at A$22 each 15 months ago; says selling low and buying high does not create shareholder value
** Morningstar expressed caution about expensive shares, which are trading at 100 times next year's earnings
** Flags no impact on fair value estimate from buyback, maintains PT at A$16 per share
** GYG stock posts record intraday pct jump on Thursday following share buyback plan and results, before closing 2.3% lower at A$26.39
** Stock last down 1.8%, taking YTD losses to 36.3%
($1 = 1.5270 Australian dollars)
(Reporting by Nichiket Sunil and Kumar Tanishk in Bengaluru)
((Nichiket.Sunil@thomsonreuters.com))