05.06.2018

Italy: Public debt sustainability

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  • Italy’s debt sustains a large interest rate shock as long as the budget is kept under control.
  • Debt sustainability depends on fiscal discipline and continued primary fiscal surpluses.
  • Public debt is predominantly held by residents; primarily by financial institutions and the central bank.

Press release (8092 Characters)Plain text

  • Italy’s debt sustains a large interest rate shock as long as the budget is kept under control.
  • Debt sustainability depends on fiscal discipline and continued primary fiscal surpluses.
  • Public debt is predominantly held by residents; primarily by financial institutions and the central bank.
In 2017, Italy’s government debt reached 131.5 % of GDP which is one of the highest values in the Euro Area. We perform a debt sustainability analysis (DSA), that is, simplified though insightful, based on the formula
 
D_t=((1+r_t))/((1+g_t ) ) D_(t-1)+〖PB〗_t
 
where D_t is the debt to GDP ratio, r_t is the average annual nominal interest rate paid on government debt, g_t is the nominal GDP growth rate and 〖PB〗_t is the primary general government balance in year t.[1]
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If we assume for a moment that the primary budget (fiscal revenue minus expenditure) is balanced, as long as the nominal GDP growth rate will equal the average nominal interest rate on government debt in the future, the debt to GDP ratio will be held constant at its current level. If the nominal interest rate is higher than the nominal GDP growth rate, debt/GDP is set to rise. 
The IMF projects 1.0 % real GDP growth on average until 2023 declining gradually from 1.5 % in 2018 to 0.8 % in 2021 and onward. The GDP deflator assumes annual changes in prices of goods and services averaging 1.4 % during the projection period. Since 2000, the primary fiscal balance of the general government averaged 1.5 % until 2017 (ranging between -1.0 % in 2009 and plus 4.5 % in 2000). In all but two years (2009 and 2010) total government revenue outsized expenditure (excluding interest cost). In the IMF’s forecast (World Economic Outlook), the primary surplus is projected to rise over time from 1.7 % in 2017 to 3.6 % in 2023. 
Average interest expenses have been declining to an all-time low in Italy. In 2017, average interest cost – calculated as the difference between the general government deficit and the primary deficit as a percentage of outstanding debt – was 2.8 % decreasing steadily from a peak in 1991/92 at more than 10 %. Assuming the IMF’s forecasts for nominal GDP growth and the primary budget balance (as described above), if the average debt servicing costs remains constantly at 2.8 % per year, then the government debt will decrease to 116.1 % of GDP until 2023 (Figure 1 - see PDF).
 
It can be seen that this scenario (r = 2.8 %, grey dashed line) is very similar to the IMF’s own forecast (dark blue line) for debt/GDP until 2023. All else equal, if the average debt refinancing cost will be higher than the interest cost of maturing debt, then the total average debt servicing cost will rise above 2.8 % and the debt trajectory will become higher. 
The average debt servicing cost (coupon) of maturing bonds in the rest of 2018 is 3.1 % (Figure 2 - see PDF). If the government would refinance at exactly that rate, the total debt servicing cost would remain constant at 2.8 % (debt/GDP is shown by the grey dashed line in Figure 1), all else equal. If the refinancing rate would be higher than the coupon on maturing debt, than the debt trajectory would be higher. As can be seen, the debt/GDP trajectory for average debt servicing cost of 4 % would still imply a gradual decline until 2023 (dark blue dotted line).
 
In addition to debt sustainability, the structure of debt by holding sector can be crucial for financial stability. The structure of Italy’s public debt has changed quite significantly. As figure 3 shows, the share of foreign holdings of Italian government debt securities declined during the Euro Area crisis from 50 % in early 2010 to 36 % in 2013 and has stayed constant since then. Italian financial institutions compensated for the declining importance of non-residents, increasing their exposure to the Italian sovereign. At a later stage the Banca d’Italia increased its government bond holdings in line with the ECB’s public sector purchase program (PSPP). Within the PSPP 341.2 bn EUR of Italian debt securities have been bought between March 2015 and April 2018 (Source: ECB).
Italy has the lowest share of non-residents holding government debt securities among its Southern European peers. In February 2018, 35.7 % of government debt securities, which were issued by the Italian government, were held by non-residents (Source: Banca d’Italia). In Spain 41.5 % (Q3 17), Portugal 42.8 % (Q4 17) and Greece 36.9 % (Q3 17) of government debt securities were held by non-residents.   On the one hand, a lower degree of non-resident government bond holders is associated with a higher degree of crisis resilience as residents are thought to be more likely to hold on to their domestic government bond holdings[2]
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On the other hand, government debt is less diversified which makes domestic financial institutions particularly exposed to sovereign risk.
 
Overall, it can be concluded that Italy’s public debt to GDP is not likely to further increase based on higher refinancing costs. However, this is conditional on fiscal discipline and continued primary fiscal surpluses in the years ahead. The IMF’s projection of primary fiscal surpluses is ambitious though necessary to significantly reduce the public debt to GDP ratio and revert the accelerated indebtedness following the global financial crisis.
 
 

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[1]The equation can easily be derived from Auerbach, A. (1994): “The U.S. Fiscal Problem: Where We Are, How We Got There and Where We’re Going”, NBER Macroeconomics Annual 9, Stanley Fischer and Julio Rotemberg (eds.) and is a simplified version of the IMF’s DSA framework; see IMF (2013): “Staff Guidance Note for Public Debt Sustainability Analysis in Market-Access
Countries”, May 6, 2013
 

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[2]Data used for cross-country comparisons are based on the Bruegel dataset on sovereign bond holdings: Merler and Jean Pisani-Ferry, Who’s afraid of sovereign bonds, Bruegel Policy Contribution 2012|02, February 2012..


Authors

Martin Ertl Franz Zobl
Chief Economist Economist
UNIQA Capital Markets GmbH UNIQA Capital Markets GmbH
 
 
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