** UBM falls 4 pct, its worst day since October2014, with a downgrade at Deutsche Bank and continuing pressureon China-exposed equities hurting performance
** CSI300 index ends down 6.8 percent, ShanghaiComposite Index falls 5.9 percent
** Multiple sector analysts note co's exposure to thecountry: UBM derived 23 pct revenues from China in 2014according to Thomson Reuters data
** Fifth straight day of losses, breaks down to 6-month lowand among top losers on Stoxx 600
** Deutsche Bank downgrades to "hold" from "buy", notes lowgrowth in exhibitions portfolio as well as competitive pressureat Furniture China show
(RM: alasdair.pal.thomsonreuters.com@reuters.net)