Spanish finance minister Luis de Guindos says the country has made key reforms and deflation is a benefit for consumers.
George Soros, chairman of the Soros Fund Management, says the European Central Bank's quantitative easing will only benefit the owners of assets and widen the gap between rich and poor.
Ignazio Visco, governor of the Central Bank of Italy, says the European Central Bank's monetary policy is not aimed at the euro's exchange rate.
Lord Malloch-Brown, senior advisor at FTI Consulting, says that Putin was the big loser at Davos while European Central Bank President Mario Draghi stole the show.
The People's Bank of China says European Central Bank quantitative easing will boost the European economy and be a positive for Chinese exports.
Frances O'Grady, general secretary of the Trades Union Congress, says the British public has not felt the economic recovery.
Benoît Coeuré, executive board member of the European Central Bank, says quantitative easing will help boost inflation in the euro zone.
Benoît Coeuré, executive board member of the European Central Bank, says the bank is independent and was not pressured by politicians in its decision to announce quantitative easing.
Christiana Figueres, executive secretary of UN Framework Convention on Climate Change, says world leaders are bullish on climate change and are ready to take action.
European markets opened higher on Friday as global markets react to the European Central Bank's (ECB) decision to launch a full-scale bond-buying program.
Benoît Coeuré, executive board member of the European Central Bank, says the positive reaction from the market after the announcement of quantitative easing was encouraging.
Turkey's Finance Minister, Mehmet Simsek, says low commodity prices could help Turkey grow 5 percent this year.
Turkey's Finance Minister Mehmet Simsek, says European Central Bank quantitative easing is good news for Turkey and should help the country's economy.
Turkey's Finance Minister, Mehmet Simsek, says the country will continue to keep its borders open to refugees fleeing the 'barbaric' Islamic State regime.
Michael Izza, CEO of ICAEW, says quantitative easing by the European Central Bank will boost the euro zone economy. He also discusses the threat of a British exit from the European Union to the bloc's stability.
Speaking at the World Economic Forum in Davos, John Chambers, CEO of Cisco, says the number of cyberattacks on company's will be worse in 2015 than last year.
Speaking at the World Economic Forum in Davos, John Chambers, CEO of Cisco, gets bullish on the Internet of Things.
Oleg Deripaska, president of Rusal, says it is unclear whether the Russian government will enact reforms due to the low oil price.
CNBC's Hadley Gamble discusses the legacy of Saudi King Abdullah.
Herman Gref, CEO of Sberbank, says the low oil price has created a "dramatic" situation for Russian banks and some will go bust.
Geoff Cutmore is co-anchor for CNBC’s flagship programme Squawk Box in EMEA; the three-hour show bookends the opening of European equity markets.
Based in London, Tso co-anchors CNBC flagship show in EMEA, Squawk Box, a show that sets the news agenda every trading day.
Stephen Sedgwick co-anchors CNBC's flagship program Squawk Box Europe and is also CNBC's OPEC reporter covering major meetings.