** Shares of Norwegian Cruise Line Holdings NCLH.N up 3.5% at $19.87 premarket

** Brokerage J.P.Morgan upgrades stock to "overweight" from "neutral"

** Cites management comments pointing to zero detectable change in demand behavior to date despite "noise" in the macro backdrop, including no changes in onboard spending, cancellation rates and booking curves

** Notes NCLH intended to provide a prudent annual forecast; says CFO clarified that demand trends are "well intact" for co's luxury brands Oceania and Regent, which can drive profit

** Says CFO cited a potential revenue "boom" from Russia-Ukraine truce scenario

** Co in late February beat Q4 profit estimates while forecasting annual profit below expectations

** Average recommendation of 23 analysts is "buy"; with a median PT of $30- data compiled by LSEG

** NCLH has fallen ~25% YTD

(Reporting by Neil J Kanatt in Bengaluru)

((Neil.JKanatt@thomsonreuters.com;))