** Shares of British supermarket group Sainsbury SBRY.L dip over 4.5% to 330.40p; second worst performer on the FTSE 100 index .FTSE
** Goldman Sachs double-downgrades stock rating to "Sell" from "Buy" and trims PT to 335p from 390p
** Last week, co warned that uncertainty over the impact of the Iran war on shoppers is clouding its outlook and could drag profits lower this year
** Goldman says "outlook from here is likely to be more challenging"
** On average, 13 analysts rate the stock "hold"; their median PT is 360p - data compiled by LSEG
** Up to last close, stock had risen 2.8% YTD
(Reporting by Joel Jose in Bengaluru)
((joeljose@thomsonreuters.com))