AI Summary. Demand and supply curves estimated from pre-pandemic data imply relatively flat demand curves in the US and euro area, so adverse supply shifts would produce large output losses but comparatively little inflation. The authors argue explaining the observed combination of high inflation and output requires outward demand shifts, including accommodative monetary policy alongside fiscal expansion.

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Giannone and Primiceri revisit the relative role of supply vs. demand shocks in generating the post-Covid inflation. Because aggregate demand curves estimated from pre-pandemic data are flat, supply shocks alone would not have generated large inflation in the absence of added demand stimulus.

Did outward demand shifts, not supply shocks alone, drive recent inflation?

Core argument: Demand curves estimated from pre-pandemic US and euro-area data are relatively flat, reflecting central banks’ strong pre-pandemic responses to inflation, so adverse supply shifts produce large output losses but comparatively little inflation.

Demand and supply curve slopes are estimated from pre-pandemic data using the essentially definitional restriction that supply shocks move prices and output in opposite directions along demand curves, while demand shocks move them together along supply curves; the plotted slopes represent Bayesian posterior medians rather than uniquely identified estimates. The estimated demand curves are relatively flat in both the US and euro area [Figure 7], reflecting the central banks’ strong pre-pandemic responses to inflation. With those slopes, adverse supply shifts cause large output losses but comparatively little inflation. [To successfully explain] the combination of inflation and output observed in 2022 therefore requires demand to shift outwards too. Strong demand, including unusually accommodative monetary policy [on top of strong fiscal expansion], cushioned the output losses while increasing inflation [Figure 7]. In 2021–22, both inflation and GDP as subsequently revised exceeded forecasts in the US and euro area. That combination is suggestive of unexpectedly strong demand, whereas an adverse supply surprise alone would raise inflation but lower output. [Figure 9].

Takeaways by Macro Roundup® AI

  1. Demand curves estimated from pre-pandemic US and euro-area data are relatively flat, reflecting central banks’ strong pre-pandemic responses to inflation, so adverse supply shifts produce large output losses but comparatively little inflation.
  2. Explaining the 2022 combination of inflation and output requires an outward shift in demand, with strong demand — including unusually accommodative monetary policy atop fiscal expansion — cushioning output losses while raising inflation.
  3. In 2021–22, both inflation and GDP as subsequently revised exceeded forecasts in the US and euro area, a combination suggestive of unexpectedly strong demand, since an adverse supply surprise alone would raise inflation but lower output.

AI Summary. The Institute of International Finance reports global debt as a share of output rose less than 10 percentage points between 2018 and mid-2026, peaking at 337% in early 2021 before falling 27 percentage points by the end of 2023. Inflation eroded the debt burden, as it did in the UK after the Second World War.

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Wolf notes that the global debt-to-GDP ratio rose by less than 10pp btw 2018 and June 2026: after peaking at 337% in early 2021, it fell by 27pp by the end of 2023, as inflation boosted nominal GDP and eroded the value of existing debt.

Does inflation reduce the global debt burden?

Core argument: IIF data show the global debt-to-output ratio reached a post-Covid peak of 337% in early 2021 before falling by 27 percentage points by the end of 2023, with inflation identified as the force that eroded it.

The IIF shows that between 2018 and June 2026, the rise in the ratio of global debt to output was less than 10 percentage points. The story is striking: the ratio reached a post-Covid peak of 337% in early 2021, before falling by 27 percentage points by the end of 2023. What was this magical “debt-buster”? Good old-fashioned (and supposedly “unexpected”) inflation. This is — to put it mildly — not the first time inflation has wiped out debt. It was, to take one of countless examples, an important part of the UK’s elimination of its post-second-world-war debt. For countries able to print the money in which their debt is denominated, that is often what happens.

Takeaways by Macro Roundup® AI

  1. IIF data show the global debt-to-output ratio reached a post-Covid peak of 337% in early 2021 before falling by 27 percentage points by the end of 2023, with inflation identified as the force that eroded it.
  2. Between 2018 and June 2026, the IIF shows the ratio of global debt to output rose by less than 10 percentage points.
  3. Inflation has wiped out debt before, forming an important part of the UK’s elimination of its post-second-world-war debt, and often does so for countries able to print the currency in which their debt is denominated.

AI Summary. An analysis of 22 rich countries estimates that if each refinanced its entire debt at current five-year bond yields, Britain would need the largest primary surplus to stabilize its debt-to-GDP ratio, about 1.5%, followed by Italy at 1.4%, France at 1.2% and America at 1%.

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Refinancing the entire US debt stock at the current five-year borrowing rate, on current growth forecasts, would require a primary surplus of 1% of GDP to hold the debt ratio stable, a fiscal consolidation of 4.7pp. In October 2025, it would have required 2.3pp.

How much belt tightening would rich countries need to stabilize debt?

Core argument: The Economist calculates that Britain would need the largest primary surplus of 22 rich countries, about 1.5% of GDP, to hold its debt-to-GDP ratio stable if it replaced its entire debt stock at today’s five-year yields.

The Economist calculated what would happen if rich countries had to replace their entire debt stocks at today’s five-year bond yields, using IMF forecasts for nominal growth. Out of 22 countries, Britain would need to run the largest primary surplus, of about 1.5% of GDP, merely to keep its debt-to-GDP ratio stable. Italy and France are next, needing surpluses of 1.4% and 1.2%, respectively. America is not far behind, requiring one of 1%. Japan can run a deficit of 0.8% since its growth is estimated to outpace the interest rate on its debt. America is running a primary deficit of nearly 4% of GDP, meaning significant belt tightening of nearly five percentage points of GDP is needed to stabilise its debt ratio at today’s borrowing costs. The situation is deteriorating fast as a result of persistent deficits and surging yields. Just a year ago America required an adjustment of more than two percentage points less than it does today.

Takeaways by Macro Roundup® AI

  1. The Economist calculates that Britain would need the largest primary surplus of 22 rich countries, about 1.5% of GDP, to hold its debt-to-GDP ratio stable if it replaced its entire debt stock at today’s five-year yields.
  2. America requires a primary surplus of 1% of GDP to stabilise its debt ratio at today’s borrowing costs while running a primary deficit of nearly 4%, implying belt tightening of nearly five percentage points of GDP, by The Economist’s calculation.
  3. Japan can run a primary deficit of 0.8% of GDP and still keep its debt burden stable because its growth is estimated to outpace the interest rate on its debt, while Italy and France need surpluses of 1.4% and 1.2%.

AI Summary. Much of the official-sector inflow into the U.S. now comes from investors who are not traditional reserve managers, and those flows remain heavily tilted toward the dollar and toward risk assets rather than Treasuries. The author argues this shift in the global investor base helps explain why Treasuries trade at a discount while the dollar retains a premium.

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The stock of global dollar reserves has been roughly stable over the past decade. The world is not moving away from the dollar: dollar assets are shifting from official holdings of Treasurys towards private and quasi-sovereign holdings of risk assets.

Why do Treasuries trade at a discount while the dollar keeps premium?

Core argument: Most official-sector inflows into the U.S. come from investors who are not classic reserve managers, and those flows remain heavily tilted toward the dollar, so any real de-dollarization would likely begin among these investors.

Most of the current flow into the US from the “official” sector is coming from investors who are not classic reserve managers. Those flows remain heavily tilted toward the dollar, at least for now. Any real de-dollarization would likely occur first among these investors. Put differently, the dollar’s global role is increasingly as a source of returns, not a source of safety. The foreign bid, private and public, is for risk, not for Treasuries. It is currently fashionable in some circles to point to the diminution of the “convenience yield” on Treasuries even while the U.S. dollar continues to enjoy such a privilege. But the shift in the global investor base and their apparent portfolio preference for U.S. risk assets in lieu of Treasuries may help explain the divergence between the convenience yield on Treasuries and the convenience yield on the USD.

Takeaways by Macro Roundup® AI

  1. Most official-sector inflows into the U.S. come from investors who are not classic reserve managers, and those flows remain heavily tilted toward the dollar, so any real de-dollarization would likely begin among these investors.
  2. The dollar’s global role is increasingly as a source of returns rather than safety, with the foreign bid, private and public, directed at risk assets rather than Treasuries.
  3. The shift in the global investor base toward U.S. risk assets in lieu of Treasuries may help explain the divergence between the convenience yield on Treasuries and that on the dollar, and suggests the “profit dollar” is likely trading at a historical premium.

AI Summary. An estimate of the intrinsic 10-year US Treasury rate, built from actual inflation and real economic growth, far exceeded the actual 10-year Treasury rate after inflation surged, and that gap has since narrowed to roughly 4.75% actual versus 5.41% intrinsic.

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Damodaran’s “intrinsic” 10-year Treasury rate—calculated as US real GDP growth plus inflation—has broadly tracked the nominal 10-year Treasury yield since 1962. As of early September 2026, the 10-year yield of ~5% was 41bp below his 5.41% intrinsic-rate estimate.

Do long-term Treasury rates line up with inflation and growth fundamentals?

Core argument: As of September 2026, the US 10-year Treasury rate stood at 4.75% while the intrinsic 10-year rate was 5.41%, a gap of 66 basis points.

[The graph shows] the actual inflation rates and real GDP growth rates for the US, going back to 1962, and [the implied] intrinsic 10-year treasury rate (the cumulative column) and actual 10-year treasury rate each year. When inflation surged in 2022, interest rates went up, but since the rates that I am tracking are long term rates, the intrinsic risk free rate vastly exceeded the actual rate that year, but the difference has narrowed over time, and almost dissipated by September 2026 (when the US 10-year treasury bond rate was [5%] and and the intrinsic ten-year rates yielded 5.41%).

Takeaways by Macro Roundup® AI

  1. As of September 2026, the US 10-year Treasury rate stood at 4.75% while the intrinsic 10-year rate was 5.41%, a gap of 66 basis points.
  2. When inflation surged in 2022, the intrinsic risk-free rate vastly exceeded the actual 10-year Treasury rate, and that difference has narrowed since.
  3. The intrinsic 10-year Treasury rate is built from actual US inflation and real GDP growth rates going back to 1962 and compared against the actual 10-year Treasury rate each year.

AI Summary. A decomposition of the 2.54 percentage-point rise in the 10-year US Treasury yield attributes 1.56 points, nearly two-thirds, to a higher term premium rather than expected future short-term rates. The author argues the premium had earlier turned negative as the Federal Reserve absorbed long-dated Treasury and mortgage-backed issuance, removing interest-rate risk.

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Lustig presents a decomposition that attributes 156bp of the 254bp rise in the 10-year yield since March 2022 to an increase in the term premium, which he associates with the additional duration risk borne by investors as the Fed reduced its balance sheet.

Is the term premium driving most of the yield increase?

Core argument: Of the 2.54 percentage point increase in the 10-year Treasury yield since March 2022, 1.56 points — nearly two-thirds — comes from a higher term premium, according to the author's decomposition.

I plot a decomposition of the increase in the 10-year yield into a term premium component and a future short rate component. According to this measure, a big chunk —1.56 pps (or nearly 2/3 rds)— of the 2.54 pps increase in the 10-year yield since March 2022 is actually due to an increase in the term premium. That premium (the red line in the figure) turned negative around 2015, and [when] it bottomed out in 2020, yields (black line) were trading 135 bps below the path of future short rates (blue line). That’s not entirely surprising: The Fed was absorbing a large share of Treasury issuance at the long end of the yield curve —as well as MBS issuance— effectively removing a great deal of interest rate risk from the market.

Takeaways by Macro Roundup® AI

  1. Of the 2.54 percentage point increase in the 10-year Treasury yield since March 2022, 1.56 points — nearly two-thirds — comes from a higher term premium, according to the author's decomposition.
  2. The term premium turned negative around 2015 and bottomed in 2020, when 10-year yields traded 135 basis points below the path of future short rates.
  3. The author attributes the 2020 trough in the term premium to the Fed absorbing a large share of long-end Treasury and MBS issuance, effectively removing interest rate risk from the market.

AI Summary. US saving-investment data show that non-financial corporations remain net savers, unlike the early-2000s information technology boom when they flipped to net borrowers and their capital spending accounted for the entire current account deficit. Government dissaving through the budget deficit, not the artificial intelligence buildout, is absorbing national resources.

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Brooks argues, “The AI buildout isn’t why government bond yields are rising,” noting the US non-financial corporate sector was a net saver as of Q1 2026, which suggests government deficit spending is driving up long yields.

Is the AI buildout or the budget deficit absorbing national saving?

Core argument: US non-financial corporates remained net savers in the saving-investment balance data through the first quarter of this year, unlike the AI capex buildout narrative would suggest.

The chart shows quarterly data for the US saving-investment balance going back to 1990. This is an identity that apportions the current account balance into net saving in various sectors of the economy. Households tend to be net savers, as is the financial sector and non-financial corporates. The government tends to be a net borrower. The last time we had a lot of excitement about technological innovation and higher productivity growth was in the “IT bubble” of the early 2000s, which saw non-financial corporates flip from being net savers to borrowers, i.e. the capex buildout at the time was very large and - for a few years - accounted for the entire current account deficit. Nothing like that’s happening now. It’s government dissaving, i.e. the budget deficit, that’s eating up resources, while the non-financial corporate sector stayed a net saver in data through the first quarter of this year.

Takeaways by Macro Roundup® AI

  1. US non-financial corporates remained net savers in the saving-investment balance data through the first quarter of this year, unlike the AI capex buildout narrative would suggest.
  2. Government dissaving, that is the budget deficit, is the sector absorbing resources in the US saving-investment balance, which apportions the current account balance into net saving by sector.
  3. During the early-2000s "IT bubble," US non-financial corporates flipped from net savers to net borrowers, and for a few years that capex buildout accounted for the entire US current account deficit.

AI Summary. Foreign ownership of US Treasury securities has shifted from official investors, who held the predominant share in 2008, toward private investors, whose holdings of $6.7tn now exceed official holdings of $3.9tn. Net issuance of Treasury securities boomed during and after the COVID pandemic, even accounting for Federal Reserve purchases that reduce net market supply.

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The composition of foreign ownership of U.S. Treasury debt has shifted sharply from official to private investors over the past two decades. Foreign private investors now hold $6.7T in Treasuries, vastly exceeding the $3.9T held by foreign official institutions.

Have private foreign investors overtaken official ones in holding Treasuries?

Core argument: Foreign private holdings of U.S. Treasury securities reached $6.7 trillion in mid-2025, including the Cayman Islands correction, exceeding official foreign holdings of $3.9 trillion.

Figure 5 shows a large shift in foreign holdings of US Treasurys: a diminishing role for official investors, who accounted for the predominant share in 2008, offset by a rising role for private investors. Figure 6 shows net issuance and purchases of U.S. Treasury securities during the past 25 years. The boom in net issuance during and after the COVID pandemic is particularly striking, even after controlling for the net purchases by the Fed which reduce net market supply. Foreign net purchases show a notable shift toward private purchases relative to the 2000s. As a result, foreign private holdings of U.S. Treasury securities in mid-2025 ($6.7 trillion, including the Cayman Islands correction) vastly exceed official holdings of $3.9 trillion.

Takeaways by Macro Roundup® AI

  1. Foreign private holdings of U.S. Treasury securities reached $6.7 trillion in mid-2025, including the Cayman Islands correction, exceeding official foreign holdings of $3.9 trillion.
  2. Foreign official investors accounted for the predominant share of foreign Treasury holdings in 2008, and their diminishing role has been offset by a rising role for private investors.
  3. Net issuance of U.S. Treasury securities boomed during and after the COVID pandemic, even after controlling for Federal Reserve net purchases that reduce net market supply, alongside a shift in foreign net purchases toward private buyers relative to the 2000s.