BUZZ-IMI: At 3-yr lows as brokers downgrade after profit warning
** Engineer IMI down 3.4 pct at 3-yr lows, near the bottom of the Stoxx 600, after brokers cut ratings, PTs (Other OTC: PTSH - news)
** Guidance cut on Thurs saw stock suffer its biggest one-day drop since March 2009
** SocGen (Paris: FR0000130809 - news) , JPMorgan, RBC (Other OTC: RBCI - news) , Numis all downgrade ratings on co; Morgan Stanley (Xetra: 885836 - news) , Deutsche Bank (Other OTC: DBAGF - news) cut PTs
** Downgrades motivated by co's Critical Engineering unit, which reported organic revenues in Q3 down 8 pct
** Co also bottom of UK's FTSE midcap index
** Peer Rotork reaffirms FY outlook on Friday, shares up 0.6 pct compared to 0.5 pct fall in Stoxx 600 Industrial Goods and Services Index (venkateshasoumithri.mamidipudi.thomsonreuters.com@reuters.net)