BUZZ-Cineworld: boosted by Stifel upgrade
** Cinema operator's shares up 3.5 pct, third-top FTSE 250 midcap gainer
** Stifel upgrades to "buy" from "hold", cites recent admissions data showing good growth in UK and Poland, the group's two largest markets, and share price weakness (-10% from Aug peak to Tues close)
** Broker says Cineworld is a good cash generator and with modest gearing levels, it is well placed to expand through further acquisitions (RM (LSE: RM.L - news) :rahul.b.thomsonreuters.com@reuters.net)