Ben Bernanke has brought about many policy changes and innovations since his appointment in 2006, but Financial Times columnists say launching open-ended quantitative easing may be his most important move yet.

They say the problem with previous rounds of QE was their one-time effects on markets were hard to predict and measure.

But, by having easing continue until the economy stabilizes, markets will be supported during weak periods and should remain steady. Read more.

Read: Will QE be effective?

Some are not so supportive of Bernanke’s decision, however. Lanhee Chen, Romney’s campaign policy director, says the last thing the U.S. needs is more artificial and ineffective measures. He wants to focus on creating wealth, not printed dollars.

Read: Overreaction or reality check, for a reflection on overall 2011 markets