South Korea's credit expansion is hitting a red alert, with the nation's five major commercial banks having utilized over 85% of their full-year household loan quotas in just the first half. Two of these banks have already exceeded their annual limits. Due to strict regulatory caps on total lending, the second half of the year is set to see a sharp and substantial tightening of credit, forcing banks to actively reduce outstanding loan balances. This development severs a key source of incremental funding that had been persistently driven by housing and credit loans, leading to a significant narrowing of external financing channels for leveraging stock market investments. Market leverage is now facing a forced cooldown.

The credit capacity within South Korea's banking system is rapidly depleting, threatening to put a mandatory brake on the influx of leveraged funds into the market.

The five major commercial banks have consumed more than 85% of their annual household loan growth allowances in the first six months of this year, with two institutions having already breached their full-year ceilings. Given the strict total volume control targets set by regulators, banks have almost no room for new lending in the latter half of the year. Consequently, the market anticipates a "credit cliff" materializing in the second half, which could place significant contractionary pressure on stock market leverage funded through loans.

Two primary engines have fueled the rapid loan growth: persistently high demand for housing mortgage loans and credit loans intended for direct investment in the stock market. Despite banks tightening their lending pace at the start of the year, both types of demand showed no significant decline, ultimately leading to a continuous rise in loan balances through the first half.

For investors who rely on credit to leverage their stock market participation, the available external financing channels in the second half are facing a substantive narrowing.

Quotas Under Pressure: 85% Used in First Half

According to data disclosed by South Korea's financial industry on July 12th, the combined household loan balance (excluding policy loans) of the five major commercial banks—KB Kookmin Bank, Shinhan Bank, Hana Bank, Woori Bank, and NH Nonghyup Bank—stood at 647.58 trillion won as of the end of June, an increase of 3.70 trillion won from the end of last year.

Financial regulators set household loan total control targets for institutions at the beginning of the year, capping the annual growth rate at 1.5%—lower than last year's actual growth of 1.7%—to curb the rapid expansion of household debt. Based on this target, the combined upper limit for new household loans for the five major banks for the full year is approximately 4.34 trillion won. The individual bank quotas are: KB Kookmin Bank at 909.2 billion won, Shinhan Bank at 850 billion won, Hana Bank at 880.5 billion won, Woori Bank at 826.6 billion won, and NH Nonghyup Bank at 870 billion won.

However, the actual increase of 3.70 trillion won in the first half alone already accounts for 85.3% of the full-year limit. The remaining quota for the entire year is only about 639.5 billion won, leaving extremely limited space when spread over the remaining six months.

Two Banks Exceed Limits, Requiring Balance Reductions in Second Half

The situation is even more pressing, as two of the five major banks had already exceeded their annual target ceilings before the first half concluded. This means these two banks cannot issue new loans in the second half and must also encourage repayments of existing loans to bring their balances back down to compliant levels.

The market expects a pronounced "loan cliff" effect in the second half as banks are forced to tighten new credit approvals and prioritize loan recoveries. For investors who have already used or plan to use credit loans to enter the market, this signifies a substantive narrowing of financing channels.

Stock Market Leverage Under Pressure

A key driver behind the accelerated growth in household loans has been the flow of some loan funds into the stock market. While demand for housing mortgage loans remains robust, credit loans aimed at stock market investment have also been expanding simultaneously. These combined forces pushed loan balances steadily higher in the first half.

As bank credit quotas approach exhaustion, the sustainability of this funding source is being directly challenged. If banks broadly tighten lending in the second half, the pressure from a marginal tightening of market liquidity will gradually transmit to the stock market, significantly limiting the incremental space for leveraged funds.

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