Just one look at the whoosh higher in global markets in January and you’d be forgiven smug faith in the hoary old market adage of “Don’t fight the Fed” — or to update the phrase less pithily for the modern, globalised marketplace: “Don’t fight the world’s central banks”. (or “Don’t Battle the Banks”, maybe?)

In tandem with this month’s Federal Reserve forecast of near-zero U.S. official interest rates for the next two years, the European Central Bank provided its banking sector nearly half a trillion euros of cheap 3-year loans in late December (and may do almost as much again on Feb 29). Add to that ongoing bouts of money printing by the Bank of England, Swiss National Bank, Bank of Japan and more than 40 expected acts of monetary easing by central banks around the world in the first half of this year and that’s a lot of additional central bank support behind the market rebound.  So is betting against this firepower a mug’s game? Well, some investors caution against the chance that the Banks are firing duds.