High debt triples risk premium response to fiscal deficits
Public debt at multi-decade highs in the Americas amplifies the sensitivity of sovereign risk premia to fiscal deficits, a new BIS Bulletin study shows. For high-debt economies, risk premia react nearly three times as strongly to deficit increases, driving up short-term inflation expectations.
The threefold risk multiplier
Government debt-to-GDP ratios rose in 27 of 33 economies in the Americas over the past decade, with nearly 40 percent recording increases exceeding 20 percentage points.
Analysis of 21 regional economies from 2015 to 2025 reveals that fiscal expansions trigger non-linear market reactions.
When public debt or interest payment burdens exceed national medians, Emerging Markets Bond Index spreads increase nearly three times as much following a fiscal deficit expansion of 1 percent of GDP compared to low-debt peers.
This heightened sensitivity occurs under both floating and non-floating exchange rate regimes.
Furthermore, higher risk premia feed through more rapidly into one-year-ahead inflation expectations in high-debt environments, compounding financial stability challenges.
From lost decades to Jamaica's outlier
Regional debt burdens have escalated through successive crises since the 1980s lost decade, reaching historical peaks during the Covid-19 pandemic.
Rising interest costs have outpaced fiscal revenues across most countries, driven by higher policy rates and currency depreciations rather than debt volumes alone.
Jamaica stands as a notable exception, slashing its public debt from 148 percent of GDP in 2012 to 68 percent by 2025 through sustained primary surpluses of 7 to 8 percent and binding fiscal rules.
However, current global energy shocks and household support pressures threaten to erode existing fiscal space elsewhere.
Fiscal discipline is non-negotiable
The study rightly highlights how fiscal profligacy severely undermines monetary policy in emerging markets.
Without structural spending cuts and credible debt rules, central banks will remain trapped by risk premium spikes.
Institutional independence is vital, yet it cannot indefinitely compensate for irresponsible fiscal expansion.