Rates jump 0.12%p in two months, hitting a 3-year, 7-month high while top-end rates breach 7% Geopolitical risks in the Middle East stoke inflation and spark rate hike forecasts; minus account balances surge by 1.5 trillion won

The lower limit (bottom end) of fixed-rate mortgage loans at major commercial banks has breached the 5% annual threshold, pushing the interest repayment burden on financial consumers to a critical level. This surge comes as market interest rates—the benchmark for lending rates—have risen steadily, driven by prolonged geopolitical conflicts in the Middle East that have restoked inflationary pressures and fueled expectations of domestic and international policy rate hikes. Financial experts warn that the upward trajectory is unlikely to reverse anytime soon, issuing strong alarms against excessive debt-fueled housing purchases ("Young-Kkul") or leveraged stock trading ("Bit-Too").

According to financial industry sources on May 24, KB Kookmin Bank, the nation's largest commercial lender, decided to raise its periodic and hybrid mortgage loan rates by 0.10 percentage points (p) starting this week, directly reflecting the recent rise in the 5-year bank debenture yield. With this adjustment, the lower limit of its hybrid (fixed) mortgage rate will rise to 5.07% per annum. This marks the first time in three years and months, since late October 2022, that the bank's minimum fixed mortgage rate has crossed the 5% line.

Back in October 2022, the financial market suffered from an extreme credit crunch following consecutive "big steps" (0.50%p hikes) by the Bank of Korea to tame surging inflation and foreign exchange volatility. Interestingly, the central bank’s base rate at that time stood at 3.00% per annum, which is 0.50%p higher than the current base rate of 2.50%. This discrepancy demonstrates that current market interest rates are aggressively pricing in future monetary tightening and potential rate hikes ahead of actual central bank action.

As a result, while the upper band of lending rates has already broken through the 7% barrier, the lower band is steadily crawling upward, effectively erasing the benefits of the low-interest-rate era. As of May 22, the hybrid fixed-rate mortgages offered by the five major commercial banks (KB Kookmin, Shinhan, Hana, Woori, and NH Nonghyup) stood at 4.53% to 7.13% per annum. Compared to March 27, when uncertainty surrounding the Middle East crisis reached its peak, both the lower and upper limits gained an additional 0.12%p in a span of just two months. This shift reflects the sharp increase in the 5-year bank debenture interest rate, which climbed from 4.12% to 4.24% over the same period.

A commercial bank official stated, "With bond yields skyrocketing daily to new highs, we vividly feel the extreme market volatility every single day when calculating loan interest rates."

Unsecured credit loans and variable-rate products have also faced significant upward pressure. Unsecured credit loan rates (for top-tier borrowers with a 1-year maturity) settled between 4.10% and 5.74% per annum, with the bottom end climbing 0.25%p over the past two months. Variable-rate mortgages indexed to the Cost of Funds Index (COFIX) also edged up by 0.02%p on both ends, ranging from 3.63% to 6.03% per annum, following a 0.07%p increase in the COFIX benchmark.

Despite the snowballing interest costs across all lending categories, credit line accounts—commonly referred to as "minus accounts"—are seeing an anomalous explosion in demand. The outstanding balance of individual minus accounts at the five major banks reached 41.28 trillion won as of May 21, surging by approximately 1.5 trillion won from the end of last month.

Bank officials note that some retail investors appear willing to bear high borrowing costs to ride the perceived market upswing, betting that potential stock market returns will outpace loan interest rates. However, wealth managers caution that deploying high leverage during periods of maximized global volatility can trigger catastrophic capital losses and default risks, advising investors to exercise strict financial restraint.