South Korea's National Pension Service fund lost about 181 trillion won in July, falling to 1,684.2 trillion won from 1,865.6 trillion won a month earlier, according to figures reported by Metro Seoul. Most of the damage came from one place: the fund's Korean stock holdings, which shrank by about 125 trillion won in the month. Its year-to-date return dropped to 14.84% from 27.22% at the end of June.

That loss followed a decision, made in the middle of a historic rally, to let the fund hold far more Korean equity than its own plan allowed. The fund management committee should now use its year-end review to keep the new 20.8% domestic stock target as a ceiling, rule out another suspension of rebalancing, and say plainly that supporting the Kospi is not one of the fund's jobs.

A Rule Bent During a Rally

The numbers tell the story. Korean shares made up 29.1% of the fund at the end of June, nearly double the 14.9% target for 2026, Metro Seoul and Kyongbuk Maeil reported. The National Pension Service (NPS) earned 107.37% on its domestic equity portfolio in the first half, The Korea Herald reported, as chipmakers' earnings surged. By late May the Kospi had nearly doubled for the year, Asia Asset Management reported.

A fund that far over its target would normally sell. Instead, the committee suspended its domestic stock rebalancing in January, SBS Biz reported, and on May 28 voted to raise the domestic equity target to 20.8% from 2027, with a band of 3 percentage points either side, Asia Asset Management reported. Health and Welfare Minister Jeong Eun-kyeong said the adjustment was intended to enhance the long-term profits and stability of the fund, and Asia Asset Management reported that it was also meant to limit the market impact of rebalancing. Put simply, it eased the pressure on the fund to sell Korean shares into a rising market. The same meeting ended the suspension, and rebalancing toward the new targets was set to resume in July, SBS Biz reported.

Then the market turned. As Capital Times reported, the fund's Korean equity holdings fell to 418.6 trillion won at the end of July from 543.2 trillion won. Even after that drop, domestic stocks were 24.9% of the fund, according to Metro Seoul, above the top of the new band.

Pension Money Is Not a Market Tool

The case for a bigger home stake has some merit. Korean companies' earnings have grown fast, and a fund that sold everything above 14.9% would have given up a large share of a 107% gain. Investing at home also avoids currency risk on liabilities that are paid in won. Those are fair investment arguments, and 20.8% is a defensible number if it is reached on investment grounds.

The trouble is the timing and the stated reason. A target raised after the market has already doubled, partly to avoid selling, is a target set by the market rather than by the fund's liabilities. The NPS is the world's third-largest pension fund, The Korea Herald reported, and its members are the country's workers and retirees. Their money should be managed for their pensions, not for the index level.

Concentration is the other problem. Korea's market is heavily weighted toward a few chipmakers, and Korean workers' wages, home values and jobs already depend on the same economy. A pension that doubles down on home equity adds risk to the people least able to diversify it. July showed how fast that risk can arrive: the fund lost close to a tenth of its value in a month.

There is also a precedent problem. If the rule bends when stocks rise, markets will expect it to bend when they fall, and pressure will grow for the fund to buy as a backstop. Pension funds that become policy tools tend to buy high and are asked never to sell.

What the Committee Should Decide

The committee said it would keep monitoring markets and re-examine the strategic allocation range by the end of 2026, Asia Asset Management reported. That review should do three things.

First, keep 20.8% as the target and treat the top of the band as a hard limit. No further increase should be approved while the fund sits above it.

Second, write the rebalancing rule into the fund's published policy so it cannot be paused again as it was in January: when the domestic weight breaches the band, the fund should sell back toward target over a fixed, disclosed period, such as several months. A slow, predictable schedule answers the minister's concern about market impact without suspending the rule.

Third, state in the fund's investment policy that market stabilization is not an objective. Any future change to the home equity target should come with a written analysis tied to members' long-term liabilities.

Chair and CEO Kim Sung-joo said in August that the fund was still maintaining solid performance and would rely on risk management and portfolio diversification, The Korea Herald reported. The year-end review is the place to show that. When the NPS publishes its next asset-class breakdown, the domestic equity weight will show how far the fund still sits above the band it set for itself.

This editorial is general commentary, not financial advice.