UK's Bellway slides after trimming FY margin outlook
** Shares of homebuilder Bellway BWY.L down 8.7% at 1,952p ** Stock among top losers on FTSE 250 .FTMC, which is down about 0.5% ** Co expects FY26 underlying operating margin of about 10.5%, down from previous guidance of 11% ** Stock has fallen about 29% YTD (Reporting by Judes Joseph in Bengaluru) ((judes.joseph@thomsonreuters.com;))