Ireland has been rewarded for sticking to the plan set down by its international creditors with new waves of foreign investment – but this may not be enough to restore it to health.

The most recent example of international investors giving Ireland the stamp of approval, after its bailout exit in December, was the successful sale of 3.75 million euros ($5.1 billion) worth of Irish government debt on Tuesday. Much of the offering was bought up by foreign investors, particularly from Northern Europe, according to market sources, which could help to dispel the worry that peripheral euro zone countries may become more exposed to their own debt if domestic banks buy up their country's bonds.