See which government bonds have low debt-to-GDP, preferably under 30%, with low budget deficits and a current account surplus or strong current account balance in a country that is growing at least 3% GDP annually.
But is not a stronger yen and a weaker dollar just what is needed to reduce Japan's large current-account surplus and America's current-account deficit?
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According to Martin Neil Baily, a senior fellow at the Peterson Institute for International Economics in Washington, the "striking thing" about last year's report was that it painted a rosy view of the trade imbalance by focusing on the capital account surplus, rather than its inverse, the current account deficit.
Despite a long history as a huge exporter of commodities, Indonesia has flipped from having a trade account surplus to a deficit in recent months, and last quarter recorded its biggest ever current-account deficit.
Its current-account surplus has narrowed largely because of an increase in domestic investment, not consumption.
High commodity prices have given Brazil a large current-account surplus for the past few years.
It expects China's current-account surplus to double in dollar terms between 2010 and 2014.
As a result, exports are already growing and Ireland has moved into a current-account surplus.
Public finances were mostly in balance, public debt fell and the region ran a current-account surplus.
Its current-account surplus has almost halved to around 6% of GDP from 11% in 2007.
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Thailand, whose whopping current-account deficit helped trigger the turmoil, is now running a monthly current-account surplus.
Russia is in the lucky position of having relatively low debts and a big current-account surplus.
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Nor is there much worry about a potential nasty side-effect of a booming current-account surplus: rising inflation.
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Over the years, Japan has continued to achieve an annual current account surplus.
It has an inflation rate of less than 1% and a current-account surplus that has reached 15% of GDP.
In reality, China has a current-account surplus, which means that savings must exceed investment, not the other way around.
First, Switzerland's current-account surplus is forecast to be 8.7% of GDP this year.
That turnaround exceeds the increase in China's current-account surplus over the same period.
Japan's current-account surplus in February was 46% bigger than a year earlier, partly thanks to rising exports to China.
China's current-account surplus has fallen from 11% to an estimated 6% of GDP.
Reserves fell in China during the last quarter of 2011 partly owing to the narrowing in its current account surplus.
Its foreign-exchange reserves are now four times as large as its short-term foreign debt, and it has a current-account surplus.
So Mr Moreno's latest wheeze involves responding to a vanishing current-account surplus with strict import controls, which will undermine growth.
Germany has a huge current-account surplus and so is not dependent on flighty foreign capital to keep its companies primed.
The country's roaring exports contributed to a growing current-account surplus, which exceeded 10% of its GDP in 2007 (see chart 3).
In London last week, Mr Schauble said suggestions that Germany's current account surplus needs to fall "did not make any sense".
Germany's EU partners reckon that a country with a budget close to balance and a big current-account surplus could do more.
And, on Monday, figures were released showing that Japan's current-account surplus rose in February for the eighth month in a row.
Instead, the yen's strength is a by-product of private sector recycling of the current account surplus and international purchases of Japanese assets.
As the world's fastest-growing big economy, with the biggest current-account surplus and foreign reserves, its currency ought by rights to be rising.
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