** Shares of customer engagement platform Twilio TWLO.N advance 6% to $154, hitting over four-year high
** Bank of America Global Research double upgrades stock to "buy" from "underperform", hikes PT to $190 from $110 - highest on Wall Street
** Expects TWLO to be key infrastructure layer for AI-driven voice and messaging use cases; could become communication backbone of many future AI digital experiences
** BofA to now focus on co's gross profit dollar growth as indicator of fundamental growth and forecasts it will continue accelerating
** Industry expert checks suggest TWLO's technology is insulated from AI replacement or disruption risks, to become evident in co's results, brokerage says
** Twenty-four analysts rate stock "buy" or higher, five "hold" and one "sell"; median PT at $147 - LSEG-compiled data
** Including session's moves, stock up 8% YTD
(Reporting by Purvi Agarwal in Bengaluru)
((Purvi.Agarwal@thomsonreuters.com;))