Southeast Asia’s banks are running meaningful concentration risks that could see a single large corporate default wipe out an entire year of sector profits in some markets, S&P Global has warned. In comments highlighted by Asian Banking & Finance, the rating agency singles out Brunei, the Philippines and Thailand as among the most exposed to loan‑book concentration, even as overall capital ratios and asset‑quality indicators look comfortable on the surface. The concern is that rapid growth in a few dominant borrowers or sectors has left banks’ earnings more vulnerable than headline metrics suggest.
In smaller systems such as Brunei, a limited pool of large corporates and state‑linked entities naturally leads to chunky single‑name exposures. In the Philippines and Thailand, S&P notes pockets of concentration in conglomerates, property groups and certain project‑finance deals, areas that benefitted most from pre‑pandemic and post‑pandemic investment cycles. If any of those large counterparties were to run into distress – whether because of higher interest rates, geopolitical shocks or sector‑specific downturns – the hit to banks’ profit and loss accounts could be swift and sharp.
The warning comes even as regional regulators have pushed banks to raise capital and clean up legacy bad loans since the global financial crisis and, more recently, the pandemic. Capital adequacy ratios are generally above minimums, and non‑performing loan levels are manageable in most markets. But S&P’s point is that those buffers need to be viewed in the context of underlying concentration: a system can look solid until one outsized exposure goes sour, at which point provisions and write‑offs can quickly eat through a year’s earnings, or more.
Mitigating that risk will require a mix of better risk management, deeper capital markets and, over time, more diversified economies. Banks can reduce single‑name exposures by syndicating more large loans, using credit insurance, or tapping bond markets to spread funding across a wider investor base. Regulators, for their part, can keep tightening large‑exposure limits and stress‑testing banks against scenarios in which key borrowers face simultaneous shocks.
S&P’s comments also intersect with another theme in Southeast Asia: the rapid growth of Islamic finance and sustainable‑finance assets, much of it concentrated in a few countries and sectors. While that growth is broadly positive, it can further concentrate risk if the same big issuers dominate both conventional and Sharia‑compliant markets. The challenge for bank boards and supervisors will be to support continued balance‑sheet expansion – necessary to fund the region’s infrastructure and climate‑transition needs – while ensuring that a single corporate wobble cannot bring a year of profits crashing down.
