Norway's $2.3 Trillion Wealth Fund Proposes $80 Billion Cut to U.S. Treasury Holdings

Eighty billion dollars—roughly 37% of the U.S. Treasury holdings managed by the world's largest sovereign wealth fund—is slated to be reallocated into corporate and mortgage-backed debt under a new proposal from Norway's central bank. The shift represents a fundamental restructuring of how the $2.3 trillion fund manages its fixed-income portfolio, moving capital away from sovereign paper and toward riskier, higher-yielding assets.[1][2][3][5]

In a September 1, 2026, letter to Norway's finance ministry, the fund's leadership formally requested the shift. "We recommend that the government subindex of the bond index be reduced from 70% to 50%," Norges Bank Governor Ida Wolden Bache and Norges Bank Investment Management (NBIM) CEO Nicolai Tangen wrote.[1][5]

For the United States, which represents the fund's largest single debt market, the adjustment carries massive implications. The proposal would cut U.S. Treasury exposure from 34.1% of the bond index down to 21.9%. Based on the fund's $215 billion Treasury position at the end of June, the reduction amounts to an $80 billion withdrawal from government debt.[1][4][5]

However, that freed capital would not leave the dollar ecosystem. Instead, the fund's allocation to non-government U.S. fixed income—specifically corporate bonds and agency mortgage-backed securities—would rise from 16.2% to 27.6%. "What changes is the mix inside the dollar market: less U.S. government debt, correspondingly more U.S. mortgage and government-related bonds," an NBIM spokesperson confirmed.[1][5]

The reallocation signals a growing institutional wariness toward sovereign debt amid elevated global borrowing and persistent inflation. Bache and Tangen argued that a 50% government bond share remains sufficient to cover the fund's liquidity needs even during periods of severe market turbulence. Holding more than that baseline, they noted, imposes an implicit cost through lower expected returns.[1][2][5]

By shifting capital into securitized bonds, the fund gains exposure to additional risk premiums. The reintroduction of mortgage-backed securities marks a notable strategic reversal for NBIM, which had previously removed these assets from its bond index in 2012 following the prolonged fallout of the 2008 financial crisis.[2][3]

Now, the fund specifically favors agency mortgage-backed securities—those backed by guarantees from entities like Fannie Mae, Freddie Mac, and Ginnie Mae. The fund's leadership noted that these assets have historically appreciated when equity markets fall, offering a risk profile closer to government bonds than to corporate debt. Under the proposal, mortgage-backed securities would account for roughly 13% of the new index, up from zero today.[1]

The U.S. market is not the only one affected by the proposed benchmark rewrite. The fund plans to reduce its holdings of eurozone government bonds from 16.8% to 14.1%, while increasing its allocation to Japanese government debt from 4.6% to 7.4%. Despite these regional adjustments, the fund's overall exposure to dollar-denominated assets will remain virtually unchanged, dipping only slightly from 52.9% to 52.5%.[1][5]

Because of the fund's sheer scale—owning approximately 1.5% of all listed companies globally and holding $592 billion in fixed-income assets—the transition requires careful execution. The proposal is currently advisory and awaits review by an Expert Council, which is expected to conclude its evaluation by January 2027.[1][4][5]

If approved by the Norwegian parliament next spring, NBIM stated that the $80 billion transition would be phased in gradually. This measured approach is designed to minimize transaction costs and avoid disrupting the liquidity of the world's deepest debt markets as the fund rebalances its massive portfolio.[4][5]