According to Philippe Ithurbide, Global Head of Research, Strategy and Analysis at Amundi, it will act through a number of channels among which interest rate, liquidity, wealth effect and forex channels, whose effects has already partly been felt in anticipation, to which should now be added confidence channels due to the program's credibility with its potential open ended feature.

According to Jean François Robin, Analyst at Natixis, Considering that a EUR 500bn asset purchase programme was anticipated, one can expect a bull flattening and convergence trades (search for liquidity plus pooling, albeit partial) to predominate, while euro looks set to extend its decline whereas risky assets, especially equities, should benefit, probably even gold in the short term...

According to Azad Zangana, Europe Economist at Schroders, the ECB's QE programme will benefit the Eurozone economy by reducing the risk of deflation; however, it is not a panacea for the monetary union's ills. Deep structural reforms are required in order to raise Europe's potential trend growth. Without structural reforms, the ECB may be forced to add additional stimulus in the future as growth falters again.

According to Craig Botham, Economist, Emerging Markets at Schroders, China's economy expanded 7.3% in the final quarter of last year, beating expectations and recording a 7.4% expansion for the year as a whole, but failing to meet the government's 7.5% target....

According to William Davies, Head of global equities at Threadneedle Investments if Greece leaves the euro, contagion will be feared, the volatility of a currency under threat will resurface, and we revisit the throes of the euro crisis we endured a few years back. Not our central case but certainly a distinct possibility...