BUZZ-RBS: weakens on Investec downgrade

** Royal Bank of Scotland (LSE: RBS.L - news) 's shares down 0.4 pct, near the bottom of FTSE 100 (index up 0.6 pct)

** Investec (LSE: INVP.L - news) analysts cut rating on co to "sell" from "hold", PT to 185p from 200p

** Investec says RBS faces potentially even less favourable environment for conduct resolution, say they now assume settlement of Global Restructuring Group (GRG) case may have material cost

** Analysts now model 500 mln stg charge in Q4 2016

** Also hike incremental conduct charge forecast in relation to U.S. DoJ investigation through Q3 2016-Q4 2018e to 6.4 bln stg from 4.8 bln stg earlier

** Hillary Clinton looks more likely to win election, which may hurt RBS's negotiating position (and that of other banks under investigation), analysts say

** RBS one of only five FTSE 100 stocks in the red, all others either healthcare (Shire (Xetra: S7E.DE - news) , AstraZeneca (Swiss: AZN.SW - news) ) or tobacco (BAT, Imperial Brands (Other OTC: IMBBF - news) ) (venkateshasoumithri.mamidipudi.thomsonreuters.com@reuters.net)