Developing world's 'complex' debt could raise costs, stall restructurings, Lazard says

LONDON - Increasingly complex debt in the world's emerging markets could raise borrowing costs and delay debt restructurings, advisory firm Lazard said on Thursday.

The proliferation of intricate debt, whether loans backed by collateral or bonds linked to economic growth or exports, has exploded since 2020, driven by aid cuts by rich nations, high borrowing costs and risk aversion due to everything from COVID-19 to Russia's invasion of Ukraine.

But top advisory firm Lazard has warned in a paper published on Thursday that the shift - praised by some investors as an innovative way to diversify borrowing - could come with a sting in the tail.

"We need to simplify the whole thing, because it is becoming really complex, and inevitably, at some point, the borrowing countries will pay the price of that," said Pierre Cailleteau, managing director at Lazard.

The shift is particularly pronounced in smaller, riskier nations known as "frontier" economies.

Some complex instruments emerged to speed up debt restructurings, for example in Zambia, where bond payouts were linked to improvements in debt sustainability, and in Sri Lanka, where they were tied to GDP performance.

Meanwhile, Angola, Nigeria and Senegal have tapped total return swaps - effectively borrowing against their own debt - as an alternative to international bonds.

The IMF has warned these can be opaque and complicated liabilities.

Uncertainty over whether multilateral lenders retain preferred creditor status - which shields them from losses when countries default - adds to the concerns.

"The combination of a lack of clarity on the hierarchy of claims and the introduction or the proliferation of those types of contingent instruments makes in fact the debt very difficult to analyze for the creditors, to determine where they are in the hierarchy of claims," Cailleteau said. "This is changing the dynamics of debt."

Zambia is in the process of buying back its contingent bond.

The World Bank has pushed for "radical transparency" on debt, and increasing debt complexity - especially the use of State Contingent Debt Instruments- has been a top agenda item at recent meetings of the International Monetary Fund and the World Bank in Washington.

Cailleteau said debt transparency should be mandatory in order to access financing from the IMF - typically the lender of last resort for countries in debt distress - and other multilateral development banks.

"We need to make transparency enforceable," said Cailleteau.

He added the premium demanded by investors on emerging market debt was near record lows - a sign, he said, of "some degree of exuberance" that may be underpricing the risks.

(Reporting by Karin Strohecker; Editing by Chizu Nomiyama )

Copyright Reuters or USA Today Network via Reuters Connect.

This story was originally published June 11, 2026 at 7:13 AM.