BUZZ-JD Wetherspoon: worst day in 5.5 yrs after warning on profits
** JD Wetherspoon falls 9 pct after warning 2016 profits will be at the lower end of analysts' expectations
** Most bearish analyst (Nomura) has FY pre-tax profits of £69 mln, v £89.3 mln for most bullish (Singer) according to Reuters data
** Mean estimate £76.91 mln
** Co also sees operating margin for half year to Jan 26 at 6.3 pct, down 1.1 pct LfL
** Worst day for stock since May 2010, hits a 2.5 yr low
** Top faller on FTSE 250
(RM (LSE: RM.L - news) : alasdair.pal.thomsonreuters.com@reuters.net)