** Shares of discount store operator Ross Stores ROST.O up 1.6% at $132.05 premarket
** Jefferies upgrades ROST to "buy" from "hold"; raises PT to $150 from $135, upside of 15.4% to stock's last close
** Brokerage says strong merchandising and favorable comparable sales comparison can drive comparable sales acceleration in second half of year and in next few years
** Expects further comparable sales boost if interest rates are reduced and housing improves, sees profit expansion opportunity in 2026 despite tariff headwinds from existing margin improvement momentum
** Also sees upside to shares as valuation discount to peers is near widest in recent history
** Average rating of 20 analysts is "buy", with median PT of $153 - data compiled by LSEG
** Up to last close, stock has fallen 14% YTD
(Reporting by Neil J Kanatt in Bengaluru)
((Neil.JKanatt@thomsonreuters.com;))