Era of zero, negative interest rates could last for years: Barclays

``The era of zero or negative interest rates, notably in Japan and the euro zone, could extend for several more years as central banks battle persistently low growth and inflation, strategists at Barclays said on Thursday... The study finds that real equilibrium policy rates are near-zero across the developed world and may need to fall further below zero in the euro zone and Japan for interest rate policy there to become "sufficiently accommodative".''