South Korea witnessed a sharp increase in household borrowing in May 2026, with loans rising from KRW2.1tn ($1.4 bn) to KRW6.9tn ($4.5bn), marking the fastest monthly increase since August 2024. Lower borrowing costs and a wealth effect driven by the stock market rally have boosted consumer confidence and encouraged investment activity. However, the rapid pace of borrowing raises concerns over the quality and sustainability of credit growth.
The strong performance of South Korean equities, particularly AI- and semiconductors-related stocks, has attracted significant retail investor participation. Driven by fear of missing out (FOMO) on potential returns, many individuals appear to have borrowed funds to invest in the stock market, mainly leveraged ETFs. According to the Financial Supervisory Service, much of the increase in lending came from personal credit lines and overdraft accounts, while investor deposits at securities firms reached a 12-month high. Although rising equity markets have generated wealth for some investors, leveraged exposure to highly volatile assets leaves households vulnerable to sharp market corrections.
The sustainability of this borrowing is particularly concerning given South Korea’s already elevated household debt burden. With a debt-to-income ratio of 174%, many households are under considerable financial pressure, and additional borrowing could further weaken balance sheets. Moreover, a significant proportion of recent loans has been taken by individuals in their 20s and 30s, whose repayment capacity is already stretched. Their debt service ratios of approximately 40–50% imply nearly half of disposable income is allocated to debt repayments, leaving limited room for consumption and savings.
GlobalData Global Lending Analytics 2025
GlobalData’s Global Lending Analytics 2025 cites 44% of borrowers in South Korea missed or have fallen behind on their loan payments in the past six months.
Most of these loans are at a variable interest rate, hence a future rise in borrowing costs could significantly increase repayment burdens and elevate default risks, particularly among lower-income and subprime borrowers. The recent increase in delinquent loans of $130.3m suggests that early signs of financial stress are already emerging.
This may also serve as an early warning sign of growing financial vulnerabilities if borrowing continues to accelerate without tighter risk controls. Stock market returns are inherently uncertain, and leveraged investing significantly amplifies downside risk during periods of market volatility. Nevertheless, behavioural factors such as FOMO can encourage speculative investment behaviour that leaves investors exposed when market conditions reverse.
Stronger intervention from regulators may therefore be necessary to prevent excessive risk-taking. Banks and financial institutions also have a role to play in strengthening financial literacy and ensuring borrowers understand the risk associated with leveraged investing. Such measures could help address risky behaviour at its source and contribute to maintaining long-term financial stability.
Overall, while the equity rally and easier credit conditions have supported household sentiment and short-term market activity, the surge in borrowing—particularly among highly leveraged younger households—raises growing risks to financial stability. Policymakers and regulators should strengthen safeguards around high-risk lending and reinforce investor protection and financial education initiatives. These steps would help curb excessive leverage and support more sustainable growth in both household balance sheets and capital markets.
Bhavya Patel is an Associate Analyst, Banking & Payments, GlobalData
