European markets finished lower on Friday and ended the week flat, as the situation in Ukraine erased any optimism over earnings season.
Standard & Poor's cut its currency rating on Russia to BBB- as capital continues to flow out amid heightened tensions with the West.
Martin Sorrell, CEO of WPP, says Brazil and India have been strong markets, while Russia and China have slowed for the company.
Martin Sorrell, CEO of WPP, says the strength of sterling is the "biggest short-term issue" for the company, creating headwinds on earnings.
The shift in the “atmosphere around tax” globally is “significant” and has “hardened,” the chief executive of WPP has told CNBC.
Martin Sorrell, WPP CEO, discusses how Google, Buzzfeed and other companies are disrupting the advertising business.
Martin Sorrell, CEO at WPP, says the firm sees strong growth in China and discusses WPP's mergers and acquisition deals in the world's second largest economy.
Some of Thursday's midday movers:
The WPP CEO describes Facebook's acquisition of WhatsApp as "potty" but adds that Mark Zuckerberg knew "what he is doing"
The up to $19 billion spent on Whatsapp by Facebook looks "a bit potty" says Sir Martin Sorrell, WPP CEO, saying the group continues to invest a lot more in Google than in Facebook.
Sir Martin Sorrell, WPP CEO, hails the group's good results and says emerging countries remain its most profitable markets but that currency issues should remain an issue through 2014.
Speaking to CNBC live at the World Economic Forum., Martin Sorrell, CEO of WPP, explains why he's positive on Eastern Europe.
Martin Sorrell, CEO of WPP told CNBC at the 2014 World Economic Forum that he has grown increasingly bullish on Russia.
Advertising industry growth in 2014 will be boosted by an improved global economy and the soccer World Cup, the chief executive of Publicis told CNBC.
Companies should start planning for Iran, analysts say, as the slow thawing of diplomatic relations with the country could open the door to foreign investment.
U.S. stock index futures signaled a higher open on Thursday, with markets still boosted by raised hopes the Federal Reserve will not start tapering off its asset purchases until next year.
Alex De Groote, media analyst at Panmure Gordon, comments on WPP's results which showed revenue growth accelerating and says the focus will be on how the group benefits from the recovery.
Sir Martin Sorrell, CEO of WPP, says that the NSA spying scandal and government shutdown have brought "significant damage to brand America".
Sir Martin Sorrell, WPP founder &CEO, explains why he thinks the merger of Publicis Groupe and Omnicom Group is "strategically flawed" as consolidation in the advertising space continues. Sorrell also explains how the merger has given his company the opportunity to "escalate our strategy," moving up their targets for new markets and new media.
Martin Sorrell, CEO of WPP explains why he is confident on the firm's growth as major global risk events recede. He remains positive on the U.K and German economies.