Global Imbalances and the Financial Crisis
another important source. Under the influence of monetary accommodation, low real
interest rates, and the emerging (and indeed advanced) world’s accelerating economic
growth, commodity prices, notably the price of oil, began to rise at an accelerating price
(see Figure 10 for real GDP growth rates and Figure 2 for commodity prices). An
immediate effect, familiar from past episodes of commodity-price boom, was a big
increase in the current account surpluses of commodity exporters. Figure 1 shows the
growing external surpluses of the Middle East and other developing commodity exporters
– as well as China’s growing surplus – starting in 2004.
Other countries had to absorb these flows of excess savings. What increased
deficits in the world economy corresponded to the higher surpluses of China and the
commodity exporters? As Figure 1 also shows, the overall surplus of advanced countries
other than the United States, which had been rising quickly prior to 2004, peaked in that
year and then declined. The deficit of the United States continued to rise through 2006.
As a result, the overall deficit of the advanced countries rose dramatically after 2004,
with Eastern Europe’s deficits adding to the total world demand for excess savings. In
part this increased deficit reflected the higher cost of commodity imports, but as we argue
below, that was only part of the story.
24 On the link between monetary policy and commodity prices, see Frankel (2008). Caballero, Farhi, and
Gourinchas (2008b) model the effect of a commodity boom on global net capital flows.
25 The events leading to the developing country debt crisis of the 1980s provide an instructive parallel with
recent financial history. Then, inflationary monetary polices helped to create an oil price boom resulting in
big oil exporter surpluses. The surpluses were recycled to “subprime” developing country borrowers
through money-center banks in the industrial countries. Because loan contracts featured adjustable dollar
interest rates, the Volcker disinflation led to repayment problems severe and widespread enough to
endanger the capital of the lending banks, Although a number of economic analysts argued prior to the
early 1980s that the sizable developing-country borrowings were justified by growth prospects, that episode
of global imbalances also ended in tears – especially for the developing borrowers, who lost many years of
IMF data on the global saving rate show overall world saving to be increasing
over this period. World gross saving averaged 22.6 percent of global output in 1987-94
and 22.0 percent in 1995-2002. But from 2003 through 2007 the annual numbers rise
steadily from 20.9 percent to 24.4 per cent. Evidently, increased saving by commodity
exporters and developing Asia outweighed decreased saving elsewhere in the world
This increase in world saving may help explain why long-term global real interest
rates remained relatively low (Figure 6), as did nominal long-term rates (Figure 11),
despite a shift toward monetary tightening in industrial countries starting in 2004 (Figure
8). Of course, world saving and investment must be equal in principle, but an
interpretation of the data as being driven by an exogenous increase in investment demand
seems inconsistent with the failure of long-term real interest rates to rise to anywhere
near late 1990s levels in the middle 2000s.
We emphasize that this increase in global saving starting in 2004 plays out largely
after the period Bernanke (2005) discussed in his “saving glut” speech, and arguably was
triggered by factors including low policy interest rates. In our view, the dot-com crash
along with its effects on investment demand, coupled with the resulting extended period
of monetary ease, led to the low long-term real interest rates at the start of the 2000s.
However, monetary ease itself helped set off the rise in world saving and the expanding
global imbalances that emerged later in the decade. Indeed, it is only around 2004 that the
26 A curious and so far unresolved aspect of the saving and investment data is the huge positive statistical
discrepancy that emerged between 2003 and 2008. The more customary “world current account deficit”
disappeared after 2002 and by 2007 and 2008, measured world saving exceeded measured world
investment by amounts in excess of $300 billion. There is a “mystery of the missing deficit.”
idea of a global saving glut (as opposed to a global dearth of investment) becomes most
A further factor contributing to lower interest rates in the United States in
particular was the rapid pace of dollar reserve accumulation by emerging and developing
countries, which also accelerated in 2004 (Figure 4). Estimates by Krishnamurthy and
Vissing-Jorgensen (2008) and Warnock and Warnock (2009) suggest that official foreign
demand for U.S. government debt depressed Treasury yields by at least 50 basis points.
Partial-equilibrium estimates, however, almost certainly overstate the general-equilibrium
yield effects of diversification out of dollars by official reserve holders. While the true
magnitude is probably secondary to the effects of global saving flows and monetary
policy, reserve accumulation nonetheless probably contributed something to the
compression of yields in U.S. financial markets.
In principle, a country with a currency peg and running a current-account surplus
27 In other words, it
need not simultaneously have a surplus in its balance of payments.
need not be building up foreign exchange reserves. Indeed, the flow of net purchases of
claims on rich countries by developing-country residents expanded dramatically over the
2000s up until the crisis; and if the capital account is open to financial outflows, the
central bank can reduce its reserves at a given exchange rate by purchasing domestic
assets. In practice for emerging markets, financial outflows are not completely
frictionless, but it also seems clear that in many cases countries purposefully accumulated
28 Emerging market
reserves as a precaution against internal or external financial crises.
borrowing spreads fell to very low levels in the mid-2000s as investors in richer countries
27 Conversely, a country can accumulate reserves even if its current account is in deficit.
28 See Obstfeld, Shambaugh, and Taylor (2010). 23
searched for higher yields, and the resulting financial inflows, resulting from
interventions meant to slow appreciation against the dollar, led to further increases in
foreign exchange reserves. Higher reserve war chests contributed to the perception of
China, with a relatively restricted capital account and a tightly managed (albeit
adjustable) exchange rate peg, had less flexibility than countries with better developed
and more open financial markets to put a brake on reserve acquisition. It also was (and
remains) the largest buyer of dollar reserves. Although the Chinese authorities undertook
opportunistic financial outflow liberalizations in an attempt to reduce balance of
payments pressures, the combination of a growing current account surplus, strong inward
FDI, and hot money inflows in response to expected appreciation spelled massive growth
in foreign exchange reserves, as we have noted.
Holding the bulk of reserves in dollars rather than, say, euros was a matter of pure
choice, however, motivated by the liquidity of U.S. bond markets and the dollar’s
dominant vehicle-currency position in world trade and finance. A country pegging its
currency to the dollar need not hold dollar reserves at all, as it can maintain an unchanged
domestic monetary stance while selling any dollars it acquires for a nondollar foreign
currency. Most official emerging-market reserve holdings were held in dollars
Within the group of advanced countries, as noted above, the two current-account
developments that stand out starting in 2004 are the sharp increase in the U.S. external
deficit and a halt in the earlier trend of increasing surpluses for the aggregate of other
advanced economies, including the euro zone. Fueling the higher overall deficit of the
advanced-country group was (along with higher commodity import prices) equity-market
appreciation and, more powerfully, an acceleration in real estate appreciation and real
30 The euro zone itself, wherein the ECB set a single interest rate for a
diverse set of national economies, presented a microcosm of the divergence in current
account positions concurrently taking place on a global scale. Starting in 2004, the
German external surplus rose sharply, but was offset by increasing deficits for a number
of other member countries such as Italy, Greece, and especially, Spain (Figure 12).
In the United States, low interest rates fed into a powerful multiplier mechanism
based on unrealistic expectations, asset-market distortions, and agency problems, notably
in markets for housing finance. The resulting asset appreciation, especially housing
appreciation, was a major driver of high consumer spending and borrowing. Home prices
in the U.S. had been rising steadily for nearly a decade. Starting in March 1997, the Case-
Shiller 10-city home price index declined in only two months before July 2006 – in
November 1998 and December 2001, and in those cases by very small amounts. Thus,
neither the Asian crisis and its aftermath nor the dot-com crash and ensuing recession did
much to dent the upward trend in U.S. home prices.
Entrenched expectations of housing appreciation interacted with low interest rates
and financial innovation to push home prices up even more rapidly after 2003. The stock
of mortgage debt expanded rapidly, as did residential investment, while at the same time,
mortgage quality in the U.S. deteriorated. Figure 13 shows how subprime and nonprime
mortgage originations more generally jumped up in 2004. At the same time, the share of
29 For a useful chronology and discussion, see Lane and Schmukler (2007).
subprime originations being securitized increased until it reached over 80 percent in 2005
and 2006. In the low interest rate environment, the share of adjustable-rate mortgages
(ARMs) also rose. As has often been noted, these loans were designed to refinance or
default when the interest rate reset, but in many cases the refinance contingency was
predicated on the assumption that home prices would not fall. Figure 14 shows the rapid
growth of residential investment and mortgage debt outstanding (both expressed as shares
of GDP, with the mortgage debt series covering commercial as well as family-owned
properties). U.S. home prices rose at double-digit rates in 2004 and 2005, while the stock
of mortgage debt pulled even with total annual U.S. GDP in 2006.
Low nominal short-term U.S. interest rates, and the expectation that rates would
rise only at a measured pace, encouraged the proliferation of ARMs. At the same time,
low nominal rates and the low-inflation environment, in and of themselves, eased credit
constraints. At higher inflation rates, the monthly nominal interest payment in part
reflects real amortization of the loan, which places an additional strain on the borrower’s
cash flow. Of course, the evidence indicates that mortgage-lending standards in the U.S.
deteriorated far beyond what any prudent assessment of borrowers’ repayment prospects
As many commentators have noted, the process was fed by wider financial
innovation that repackaged mortgages (as well as other forms of debt, including
consumer debt) into structured products endowed with very high levels of systemic risk –
what Coval, Jurek, and Stafford (2009) have aptly labeled as “economic catastrophe
bonds.” These products began to proliferate in the mid-2000s. For example, CDO
30 Mishkin (2008) surveys evidence on the impact of housing wealth on consumption. In subsequent work,
Greenspan and Kennedy (2007) document the strong link between home equity extraction in the U.S. and
issuance started to rise markedly in 2004, as indicated by figure 10.2 in Acharya et al.
(2009, p. 238); or see figure 3 in Blundell-Wignall and Atkinson (2008). Rajan (2006)
suggests mechanisms through which low interest rates might promote such financial
innovation, as well as more risk taking. Hoping to reduce their required regulatory capital
under the Basel II framework, European banks eagerly acquired AAA-rated (but
systemically risky and opaque) structured products.
Such regulatory arbitrage was one factor underlying the sharp increase in gross
industrial-country external assets and liabilities documented by Lane and Milesi-Ferretti
(2007) for the 2000s; see Figure 15, which shows some of their updated data series. In
many cases, for example, European banks funded their dollar positions in U.S. structured
products with dollars obtained through repo deals with U.S. money market mutual
32 Such socially unproductive gross flows into (and out of) the U.S. could of course
have taken place even if the U.S. current account had been in surplus at the time.
The role of the U.S. net external deficit, in our view, was to enable a constellation
of interest rates and asset prices consistent with apparently low inflation but
simultaneously conducive to housing appreciation, lax mortgage lending practices,
overall credit expansion, and strong incentives toward high leverage and regulatory
33 These market dynamics created a vicious circle in which the expectation of
ongoing housing appreciation fed mortgage credit expansion, which in turn pushed
consumption in the 2000s.
31 Acharya and Schnabl (2009). See also Blundell-Wignall and Atkinson (2008, p. 64), who suggest that
“about one-third of the securitised sub-prime related products were sold to offshore investors.”
32 See Baba et al. (2009).
33 Asset swapping leading to gross flows may be motivated by many factors beside regulatory arbitrage, of
course, ranging from risk-sharing opportunities to differences in risk aversion. The U.S. external portfolio
as a whole has tended to be short on (dollar) bonds and long on foreign equities (and currencies), with
foreign official holdings of dollar reserves comprising one important component of U.S. foreign liabilities.
housing prices higher (Mian and Sufi 2008). All the while, the U.S. current account
Housing appreciation was not limited to the United States, of course, though it
was mainly financial innovators in the U.S. who built an inverted pyramid of leverage on
the narrow fulcrum of ongoing domestic home-price appreciation. Over the 2000s, real
estate prices rose even more rapidly in some European Union countries, in Eastern
Europe, and elsewhere than in the United States. But the trend was not universal – house
prices in Germany did not rise, while land prices in Japan fell in real terms. Certainly the
high level of global liquidity, including the possibly global reach of U.S. monetary ease,
contributed to the worldwide upward pressure on housing. An intriguing regularity is the
negative unconditional correlation between current account surpluses and housing
appreciation, illustrated in Figure 16 for a sample of 43 mature and emerging countries.
The figure plots the change in the ratio of the current account to GDP over 2000-2006
34 There is a clear
against cumulative real housing appreciation over the same period.
negative relationship, in which greater appreciation is associated with bigger deficit 35
increases. Figure 17 shows the same relationship for the advanced-country subsample.
The negative relationship in the figures likely reflects two-way causality. Housing
appreciation fuels increased borrowing from abroad in several ways, whereas increased
availability of foreign funds could ease domestic borrowing terms and encourage housing
Caballero and Krishnamurthy (2009) present a model of how foreign demand for safe U.S. assets may have
led to low risk-free rates, asset appreciation, and financial fragility.
34 The basic data come from Aizenman and Jinjarak (2009), though we have added to their sample Iceland
and removed two countries with rather special circumstances, Russia and Serbia. The negative correlation
survives the addition of Russia and Serbia, but it is somewhat attenuated. Figures 14 and 15 are inspired by
chart 5 in European Central Bank (2007), which covers an advanced-country sample over 1995-2005. We
are grateful to Joshua Aizenman for sharing these data.
35 Of course, there is a long historical association between housing booms, current account deficits, and
financial crises; see Reinhart and Rogoff (2009). 28
appreciation. In addition, the bivariate plots are silent on the influence of third variables.
Aizenman and Jinjarak (2009) regress real estate prices on the lagged current account and
other control variables, including financial depth, the real interest rate, and urban
population growth. Their baseline estimate suggests that a one percent of GDP increase in
the current account deficit is associated with a 10 percent increase in real estate prices.
In many countries, easy lending conditions, including an influx of finance from foreign
banks, helped to fuel housing booms. Similar capital inflow and real estate dynamics
helped set the stage for the 1997-98 Asian crisis.
As the U.S. external deficit swelled after 2004, the Fed gradually raised the funds
rate, as noted above. That rate peaked in the summer of 2006 (by which time ECB and
Bank of England policy rates were also on the rise; see Figure 8). The U.S. long-term real
interest rate had also risen to a peak by then, and real long-term rates began to rise in
some other industrial countries (Figure 6). According to Federal Reserve data, the rate on
thirty-year, fixed-rate, conventional mortgages, having bottomed at 5.23 percent in June
2003, hit 6.76 percent in July 2006. United States housing appreciation stopped in late
2005 and 2006 and went mildly into reverse, although the stock market continued upward
(Figure 6). Around this time 2/28 and 3/27 ARMs were resetting at sharply higher
interest rates than when they were issued, straining or exceeding the payment capacities
of many who had signed mortgage contracts two or three years before. Mayer et al.
36 See also the regression evidence in Jagannathan, Kapoor, and Schaumberg (2009). Fratzscher, Juvenal,
and Sarno (2009) use a Bayesian VAR methodology to show that positive home and equity price
innovations, especially the former, have large negative effects on the U.S. trade balance. For other VAR
evidence documenting the importance of housing, see Punzi (2007) and Gete (2009). Gete (2009) also
documents the strong cross-sectional relationship between housing booms and external deficits. In their
cross-country study, Iossifov, Čihák, and Shanghavi (2008) find only a marginally significant correlation of
home prices with the current account in equations that also control for the policy interest rate.
37 See, for example, Edison, Luangaram, and Miller (2000), Quigley (2001), and Koh et al. (2005).
(2009) document how, starting in 2006, the share of nonprime housing loans with
negative equity shot up, first in the Midwest, and then, much more rapidly, in California,
Florida, Arizona, and Nevada. The stage was set for the more general financial crisis that
finally erupted in August 2007.
Global Imbalances in 2009 and Beyond
As we predicted in our earlier work, the decline in U.S. housing prices starting in
2006 set off a process of current account adjustment for the United States. In some
respects, though, the process has been quite different from what we foresaw. Most
notably, the dollar’s foreign exchange value, while quite volatile since August 2007, has
not collapsed. Financial instability spread globally from the United States, not due to the
large and abrupt exchange rate movement that we feared, but because of international
financial linkages among highly leveraged institutions as well as the global nature of the
housing bust. The fragility of the international financial system was not well appreciated
before the crisis. The magnitude of global imbalances up to 2008 both reflected that
underlying fragility and allowed the system to become ever more fragile over time.
Figure 18 shows quarterly data on the U.S. current account balance, expressed as
a percentage of GDP at an annual rate. Although the deficit has been on a declining trend
since late in 2006, the decline in recent quarters is particularly dramatic. The IMF
forecast as of October 2009 was that the U.S. external deficit would average somewhat
below 3 percent of GDP over the following half-decade or so, less than half its value in
2005-06. This is a very significant adjustment. Nonetheless, that balance may well grow
over time if U.S. monetary and fiscal policies remain accommodative. Indeed, as the U.S.
public debt/GDP ratio grows, it will become more difficult for the Fed to raise interest
rates without creating significant additional fiscal tensions.
Figure 1 gives a sense of the global reconfiguration of global imbalances,
measured in dollars (2009 figures are IMF forecasts). Alongside the sharply reduced
deficit of the United States, the surpluses of the other advanced countries and of the oil-
exporting CIS and Middle East have fallen dramatically. Newly industrialized Asia has
maintained its surplus while that of developing Asia (largely due to China) has continued
Reduction of a current-account deficit always entails a medium-term real currency
depreciation (while appreciation is needed when a surplus falls). The required
compression of relative domestic demand compared to relative domestic supply implies a
fall in the relative price of domestic nontraded goods, as well as a terms of trade
deterioration that lowers the relative price of domestic tradables consumed intensively at
home. This reasoning led us, in our earlier work on the U.S. current account, to predict
significant real dollar depreciation (in some simulations, 30 percent or more) as a result
of a disappearing U.S. deficit.
Figure 20 illustrates the dollar’s evolution in real multilateral terms since the start
of 1995. Over brief spans of time, exchange rates can be moved far away from long-term
equilibria by developments in financial markets, such as changes in policy interest rates,
expectations shifts, fluctuations in risk aversion, safe haven effects, and credit-market
disruptions. Each of these short-term factors has played a role in recent years. To
illustrate the forces at work, Table 1 reports numerical changes in the dollar’s real
exchange rate over different subperiods. (Changes are expressed in log points so as to be
additive over time.)
The large U.S. deficit’s emergence starting in the latter 1990s we marked by
strong real dollar appreciation of more than 20 percent. Appreciation was propelled by
booming investment, the Asian crisis, and the growing perception of a “Great
Moderation.” Under the pressure of very loose U.S. monetary policy after the dot-com
Table 1: Movements in the Real Dollar Exchange Rate
Period Percent change
January 1995 - February 2002 -16.2
February 2002-January 2007
January 2007-April 2008 -11.5
April 2008-March 2009 16.4
March 2009-October 2009
crash and 9/11, however, the dollar depreciated by more than 16 percent from early 2002
through the start of 2007, with a significant (but temporary) reversal over 2005 as the Fed
tightened. Through 2006, however, the U.S. current account deficit only widened as
imports outstripped exports.
As the U.S. housing boom stopped and went into reverse, and as the external
deficit began slowly to shrink, the dollar plummeted, falling by better than 11 percent
between January 2007 and April 2008. But with the intensification of perceived financial
instability in the spring of 2008, the dollar began to rise again, benefiting from a safe
haven effect in the presence of a financial crisis that was truly global in scope rather than
U.S.-specific. A second factor pushing the dollar up was a global shortage of short-term
dollar funding for foreign banks’ long positions in illiquid (often toxic) U.S. assets.
These factors helped produce a 16 percent real dollar appreciation between April 2008
and March 2009, deepening the onset of the recession in the U.S.
Since the spring of 2009, the dollar has resumed its descent, leaving its real
exchange rate currently about 6 percent below its level of January 2007, shortly after the
process of current account adjustment began. The dollar is likely to depreciate quite a bit
further as adjustment proceeds, although the process will be slower to the extent that
major U.S. trading partners, notably China, resist the appreciation of their own
Are today’s somewhat compressed external imbalances still a problem? Perhaps
one could hope that the current pattern is sustainable and will require little further
adjustment. A number of considerations suggest, however, that global imbalances remain
problematic, both for the U.S. and the world:
• The large private foreign purchases of U.S. assets that helped finance the
U.S. deficit in past years have, for the moment, contracted. Given the prospect of
much larger U.S. public-sector deficits down the road, with no clear and credible
timetable for their reduction, U.S. external borrowing will be prolonged and
investor faith in the dollar cannot be taken for granted. Recent research on crises
suggests several avenues of vulnerability as U.S. government deficits and debt
38 See McGuire and von Peter (2009).
grow, including self-fulfilling funding crises and currency collapses once fiscal
fundamentals enter a danger zone. Given the multiple equilibria involved, the
timing of such events is inherently impossible to predict. It is even conceivable, if
the fiscal regime comes to be perceived as non-Ricardian and therefore not self-
financing over time, that inflation expectations lose their customary monetary
anchor, thereby making inflation control by the Fed more difficult. In short, the
prospect of dollar instability remains.
• In the past a combination of exchange rate and other asset price
movements benefited the U.S. by bestowing capital gains on its external asset
40 These gains and
portfolio and losses on holders of U.S. external liabilities.
losses were not fully offset by differences in dividend and interest flows. As a
result, the U.S. net external position did not keep pace with cumulated current
account balances; in effect, the U.S. was borrowing at very low cost. That pattern
has, however, swung into reverse. In 2008 the U.S. deficit was slightly over $500
billion, whereas exchange rate changes and equity-market losses inflicted an
additional loss of over $800 billion on the net international investment position
(NIIP). The full result was an increase in U.S. net liabilities to foreigners of nearly
10 percent of GDP; see Figure 19. If such patterns continue for long, even a
reduced level of U.S. foreign borrowing raises sustainability concerns. It seems
plausible that in the future, foreign private investors will become less willing to
hold dollar debt in view of the unsettled U.S. fiscal predicament, while official
holders of dollar reserves may well wish to diversify into euros or other
39 See, for example, Woodford (2001). 34
currencies. As Figure 21 shows, there is a long-term trend of official reserve
diversification away from U.S. dollars, especially among the fast-growing,
reserve-hungry emerging and developing economies, and this trend continues in
recent data. If a global portfolio shift out of dollars occurs, U.S. external
borrowing rates could rise, while the customary favorable impact of dollar
depreciation on the U.S NIIP would be muted.
• China’s current and projected external surpluses remain huge. In terms of
an intertemporal trade analysis, Chinese policy is subsidizing the country’s export
of current consumption power in world asset markets, thereby keeping world real
interest rates below their true equilibrium levels. Apart from the implied
deflationary pressure on the world economy, the rest of the world’s monetary
response to this phenomenon – in the form of exceptionally low policy interest
rates – provides a breeding ground for potential new bubbles. Reduced surpluses
by China (and by Asian and other high-surplus countries more generally) would
make it easier for the U.S. to reduce its deficit further. As a concomitant, Asian
currencies would need to appreciate in real terms. These changes would have the
further benefit of reducing protectionist tensions, notably those between China
and the United States. The Asian model of export-led growth becomes more
problematic if the U.S. is no longer the world’s borrower of last resort.
40 See footnote 33 above. Gourinchas and Rey (2007) present an econometric analysis demonstrating that
U.S. net exports have predict these price adjustments in past decades.
41 There was an abrupt decline in the dollar’s reserve share for emerging and developing economies
between 2002 and 2004 (as the dollar began its recent depreciation trend). The euro was the main
beneficiary. There is evidence of a further decline in relative dollar holdings in recent quarters. In Figure
21, the dollar shares are computed relative to the reserves of only those countries that report reserve
composition to the IMF. 35
• Global imbalances reflect national regulatory systems that still await
major reforms. With the added post-Lehman investor perception that more big
institutions are operating under a predictable umbrella of government protection,
future financial instability could be in store. Large net capital inflows could
inflate asset prices and make it easier for policymakers to avoid tough choices,
including the politically difficult choice to tighten financial-sector regulation.
Historically, it has been difficult to tighten prudential supervision in bubble
episodes because inflated asset prices allow financial actors to argue that their
balance sheets are strong.
What changes in the international monetary system might mitigate global
imbalances in the future? A first concern is the proper reaction of domestic monetary
policies to outsize movements in asset prices or credit flows. It has now become clear that
ex post cuts in interest rates cannot be relied upon clean up the debris of a financial
collapse. To some degree, monetary policies should take greater account of financial-
market developments than they have in the recent past (although effective financial
regulation must be the first line of defense, as discussed below). In particular, there is a
case to be made that large current account deficits, other things equal, call for a
tightening of monetary policy. Ferrero, Gertler, and Svensson (2008) present an example
in which better macro performance comes from a monetary rule that recognizes how an
external deficit raises the natural real rate of interest. The question deserves more
Another aspect of the international monetary system that is ripe for improvement
is the surveillance of and coordinated response to large imbalances. The current
configuration of imbalances again reveals the familiar asymmetry between the adjustment
pressures facing deficit and surplus countries. The continuing U.S. external deficit is
perilous, as we have noted. Yet, reducing that deficit is hard in the face of ongoing
recession; the U.S. is in no position to take the lead.
On the other hand, China, with its international reserves at $2 trillion and rising,
has plenty of room to take the lead and should. Until now China has followed the Asian
model that Japan pioneered, orienting its economy towards exports in order to exploit
scale economies in production, to learn by doing, and to move up the value chain. With
its vast internal market, however, China (unlike smaller Asian economies) is in a unique
position to reorient its growth toward domestic demand without losing the advantages of
scale. That difficult task will require an improved social safety net, but with Chinese
consumption well under 40 percent of GDP, roughly half the U.S. rate, there is enormous
room for upward adjustment. China’s position as the leading international lender,
however, gives it little incentive to undertake consumption-enhancing reforms that would
benefit not only its citizens, but also the entire world economy. Nor, as a surplus country
able to sterilize reserve gains, is China under pressure to revalue its currency rapidly. In
the past, even credible threats of trade barriers have evoked only minor exchange-rate
changes, while China’s trade surplus has continued to rise as share of GDP.
The September 2009 G-20 Pittsburgh statement on the surveillance of external
imbalances therefore is a useful step in drawing attention to the dangers they create and
to their underlying origin in national policy choices. The recent crisis has dramatically
illustrated the important and pervasive external effects of domestic macro and financial
policies. In the interest of global stability, the policy choices of sovereign nations,
including their exchange rate arrangements, must be viewed as legitimate subjects for
international discussion and negotiation.
Another area that deserves attention is the system of self-insurance through large
holdings of international reserves. While a large stock of international reserves may
enhance the financial stability of an individual country, a system in which many countries
hold reserves as their primary form of liquidity insurance could be collectively
destabilizing. Aside from the opportunity costs of reserves to individual countries, there
are systemic costs due to external effects of reserve management. Reserve holdings may
unduly depress reserve-currency interest rates, reduce liquidity abroad when they are
mobilized in a crisis, or create exchange rate instability as markets speculate on official
portfolio shifts between different reserve currencies. Such systemic problems – discussed
in earlier incarnations by Robert Triffin and others – have come to the fore in recent
42 They could be mitigated by international
discussions of financial-system resilience.
institutions capable of creating and allocating outside liquidity in a crisis. But even a
better-endowed IMF is a very partial answer to this need. Its effectiveness requires
significant governance changes, as well as greater global attention to the worsening of
moral hazard that a bigger international lender of last resort entails. Reform of the
international monetary system is bound up with reform of the international financial
What changes in the international financial system might mitigate global
imbalances in the future? We see at least two first-order agenda items.
42 For an early and insightful discussion, see Crockett (2000).
The first is domestic financial development in the poorer economies. In some
emerging-market countries, notably China, high saving is promoted by
underdevelopment and inefficiencies in financial markets. Structural shortcomings tend
to raise both corporate and household saving rates. For example, if typical Chinese savers
had access to relatively safe instruments offering higher rates of return, huge positive
income effects would in all likelihood swamp substitution effects, resulting in lower, not
higher, household saving. The result would be higher household welfare in China, as well
as a reduction in China’s foreign surplus.
The second agenda item is the regulation of internationally integrated financial
markets. Now that the fig leaf of constructive ambiguity has been torn away,
development of a globally more effective framework for financial regulation is an urgent
priority. It is well understood that a rational and politically robust regulatory framework
will have to be based on more extensive international cooperation than currently exists –
notwithstanding the considerable progress made since the initiation of the Basel process
in the 1970s. Given their significant and growing importance in world trade and finance,
the emerging markets will rightly be full partners in any new arrangements.
As the 2009 Pittsburgh G-20 summit illustrated, however, international agreement
on further concrete common measures is far away. While this is the case, large global
imbalances will remain dangerous as possible manifestations of underlying financial
excesses. Macro-prudential regulatory stringency that responds forcefully to financial
booms will be the most important lever for avoiding financial busts in the future. A key
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prudential interventions, rather than relying on a complex and shifting web of
discretionary levers. Some observers have suggested that emerging markets use
countercyclically intensive regulatory oversight in response to big financial inflows
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Figure 1(a): Global Imbalances, 1995-2009
-800 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
United States Advanced ex-United States Developing Asia
Figure 1(b): Global Imbalances, 1995-2009
-800 95 96 97 98 99 00 01 02 03 04 05 06 07 08 09
19 19 19 19 19 20 20 20 20 20 20 20 20 20 20
Middle East Newly industrialized Asia Central and Eastern Europe
Figure 1(c): Global Imbalances, 1995-2009
Current -800 00 01 03 04
95 96 97 98 99 02 05 06 07 08 09
19 19 19 19 19 20 20 20 20 20 20 20 20 20 20
CIS and Mongolia Western Hemisphere developing Africa
Figure 2: Global Commodity Prices
20 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
All commodities Crude oil price
Figure 3(a): Real Exchange Rates of Selected Asian
5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 09
-8 8 8 8 8 9 9 9 9 9 9 9 9 9 9 0 0 0 0 0 0 0 0 0
n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n-
Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja
China Indonesia Malaysia
Source: Authors' calculations based on Global Financial Data
Figure 3(b): Real Exchange Rates of Selected Asian
5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 09
-8 8 8 8 8 9 9 9 9 9 9 9 9 9 9 0 0 0 0 0 0 0 0 0
n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n- n-
Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja Ja
Korea Thailand Philippines
Source: Authors' calculations based on Global Financial Data
Figure 4: Growth in Official Foreign Exchange Reserves
Annual change (billions of
20 We Mi As
20 S ddl ia
20 a e
r n E - J
He ap an
i s oli
p he a
+1 anno fa
Lettura consigliata dalla Prof.ssa Lilia Cavallari per il corso di Macroeconomia Internazionale. Trattasi del rapporto stilato dai professori Maurice Obstfeld e Kenneth Rogoff dal titolo "Imbalances and the Financial Crisis: Products of Common Causes". Al suo interno viene operata un'analisi della recente crisi finanziaria correlandola con le politiche economiche adottate a partire dal 2000 e con la diseguaglianza economica e sociale che queste hanno comportato.
I contenuti di questa pagina costituiscono rielaborazioni personali del Publisher Atreyu di informazioni apprese con la frequenza delle lezioni di Macroeconomia internazionale e studio autonomo di eventuali libri di riferimento in preparazione dell'esame finale o della tesi. Non devono intendersi come materiale ufficiale dell'università Roma Tre - Uniroma3 o del prof Cavallari Lilia.
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