Since most emerging market economies and financial markets are fairly small, their currencies are subject to the whims of international investors, moreso than is the case with major currencies. For that reason, when I research emerging market currencies as a whole, I often like to focus on what investors are saying are saying about their stocks and bonds.

According to one columnist, “For an asset class once considered a snake pit of risk, emerging market sovereign bonds have become remarkably popular among investors. So popular, in fact, that even the most cautious of institutions have developed an appetite. Indeed, US pension funds are poised to pour almost $100bn (£65m, €74m) into emerging market debt in the next five years…potentially helping push yields relative to US Treasuries to a record low.” The popularity of emerging market debt is pretty incredible in the context of the Greek debt crisis and the consequent spike in risk aversion. At the same time, emerging market countries have been lauded for their sound finances and low debt-to-GDP ratios, so perhaps it’s no surprise that investors remain willing to continue lending them money. “More and more investors are looking to emerging market local bonds as an alternative to standard global bond allocations, as the problems in Greece and the European periphery highlight the credit risks of that market that have been long underpriced.”

The same is basically true for emerging market stocks, as “A recovery in economic growth and exports in developing nations is boosting the outlook for…company earnings.” Added another analyst, “When you look at the most recent financial crisis, one of the key features has been that emerging market countries weathered the storm extremely well.” Going forward, the consensus expectation is that emerging markets will soon account for the lion’s share of global growth.

For the most part, investors are still quite bullish on both stocks and bonds, despite – or perhaps because of – their amazing performances in 2009. The MSCI emerging market stock index has doubled over the past year, and the JP Morgan EMBI+ bond index rose 28% in 2009 en route to a record high. Still, there is concern that since emerging market stocks and bonds are basically in line with fundamentals, a further inflow of capital would push them into bubble territory. “Jerome Booth, head of research at Ashmore Investment Management, reckons that currency appreciation will be the main source of return for local emerging market debt portfolios in the medium term. ‘The only questions are when it starts and whether it happens fast or slow: with old world currency crashes or managed adjustment.’ ” This is problematic because it means at this point, investors may be chasing currency appreciation rather than direct asset appreciation.

Some investors have started to talk about bubbles, but these appear to be more regional in nature, and the handful of bears point to specific countries rather than dismiss emerging markets outright. For example, it’s now clear that there is a bubble in China’s property market, but not necessarily in the country’s stock market. The South African Rand, meanwhile appears to be overvalued, but the Central Bank of South Africa has announced that it will allow the Rand to continue appreciating. The Chilean Peso, meanwhile, is also poised to appreciate, ironically because of the recent earthquake, as Billions of Dollars aimed at relief efforts are already pouring into the country.

There’s much else that can be said about emerging market currencies at this point, and the near-term will depend largely on if/when/how the Greek debt crisis is resolved. While emerging market investors like to pretend that this is irrelevant, the fact is that they are still somewhat skittish, and even a minor crisis would send them running towards the exits.

Currency markets operate in funny ways. Greece’s fiscal problems are hardly a new development. During years of boom and bust alike, it ran unsustainable budget deficits. Why investors have decided to fret now – as opposed to last year or next year, for example – on the distant possibility of default, is somewhat mysterious.

After all, the credit crisis exploded in 2008, and conditions now are inarguably more stable than they were at this time last year, when volatility and credit default spreads (insurance against bond default) – two of the best measures of investor risk sensitivity – were still hovering around record highs. On the other hand, the unveiling of Dubai’s hidden debt problems, has certainly provided impetus to investors to re-evaluate the fiscal situations in other highly leveraged economies. In addition, Greece just estimated that its budget deficit for 2010 at 12.7%, 4% higher than earlier estimates, which were also shockingly high. Regardless of 1, the markets are now focused firmly on Greece – and by extension, the Euro.

How serious are Greece’s fiscal problems? Serious, but not insurmountable. Its sovereign debt recently surpassed 125% of GDP, higher than the US, but lower than Japan, for the sake of comparison. Of course, the Greek economy is hardly a picture of robustness. Neither is the US, these days, for that matter, but its size means that it is pretty much immune from speculative attacks on its credit and capital markets. Greece, on the other hand, remains extremely vulnerable to the whims of international investors.

On the whole, these investors still remain willing to finance Greece’s budget deficits; the last bond issue was five times oversubscribed, which means that demand exceeded supply by a healthy margin. Still, interest rates are rising quickly, and spreads on credit default spreads have risen above 400 basis points, suggesting that nervousness is growing and Greece cannot take for granted that future bond issues will be met with such healthy demand.

In this context, in stepped the European Union. In fact, it isn’t even clear if Greece asked for help. As I pointed out above, the Greek debt “crisis” is largely playing out in capital markets, and doesn’t necessarily reflect a change in the fiscal reality of Greece. Still, leaders of the EU were alarmed enough to convene a meeting between the finance ministers of member states, to discuss their options.

After weeks of denial that any kind of aid to Greece was being considered, EU political leaders announced that they were prepared to step in to help after all, but they were vague on the details. There were no ledges of specifc dollar amounts, only hazy promises of support should conditions warrant it. In the end, what was clearly intended to comfort the markets achieved the opposite effect, as investors took no comfort in the “moral support” and worried about the new uncertainty.

It’s premature to say whether this whole episode will threaten the viability of the Euro. Much depends on whether Greece (Portugal and Spain, too, for that matter) can get its fiscal house in order (Among other things, it has promised to reduce its 2010 budget deficit by 4%). More importantly, it depends how, and to what extent, the EU responds to this crisis as a community. The Euro is already 10 years old, and you would think that it would have been accepted already within the EU, as it has by the rest of the world. On the contrary, it remains deeply divisive and fraught with politics. Many of its critics have seized on this opportunity to challenge to raise fresh calls for its abolishment. If the problems of Greece deteriorate to the point that other EU members are actually required to intervene, you can expect these calls to crescendo.