** Shares of ad firm WPP WPP.L fall as much 1.8% to its lowest since July 2009

** MS cut target price by more than 21% to 450p, which is far lower than the median PT of 520p

** Slide comes a day after it inched higher post a media report on a potential deal with Accenture ACN.N

** Currently, two brokerages rate the stock "buy" or higher, 7 "hold", and 5 "sell" - data compiled by LSEG

** As of Tuesday's close, the stock had fallen nearly 50% in 2025

(Reporting by Raechel Thankam Job)

((RaechelThankam.Job@thomsonreuters.com))