Norway's $2.3 trillion fund cuts government bonds to 50% for MBS

The world's largest state investor is preparing its biggest fixed-income overhaul in years, recommending that government bonds fall to half its benchmark index while roughly $80 billion shifts out of US Treasuries and into agency mortgage-backed securities.

"The size isn't big, but the signal that traditional holders and buyers are becoming less reliable is a very important one," Mohamed El-Erian, chief economic adviser at Allianz, told CNBC.

Norges Bank Investment Management, which runs Norway's Government Pension Fund Global, proposed lowering the government-bond share of its benchmark index to 50 percent from 70 percent in a letter to the finance ministry. US Treasury holdings would fall to 21.9 percent of the government-bond portfolio from 34.1 percent, and euro-area exposure would drop to 14.1 percent from 16.8 percent. The freed capital would lift non-government US fixed income — corporate bonds and mortgage-backed securities — to 27.6 percent from 16.2 percent. Chief executive Nicolai Tangen and Norges Bank governor Ida Wolden Bache said agency MBS, guaranteed by Fannie Mae, Freddie Mac and Ginnie Mae, carry credit quality close to US government bonds while offering higher premiums.

The proposal lands as long-term Treasury yields sit at decade highs on concern over US fiscal deficits, and it marks a retreat by a traditional buyer of US debt. The fund's overall dollar exposure would fall just 0.5 percentage points, with UK gilt weightings unchanged and Japanese government bonds rising to 7.4 percent from 4.6 percent. Final recommendations go to parliament in spring 2027.

A Diversifier Against an AI-Led Drawdown

The reallocation is not a wholesale exit from the United States. NBIM holds about $592 billion in fixed income against $1.65 trillion in equities, and its own stress testing shows a sharp correction in AI-linked stocks could erase up to $740 billion, or 35 percent, of equity value. Agency MBS offer negative correlation to equities in volatile stretches, giving the fund a buffer closer to government debt than corporate bonds as it anchors a portfolio weighted toward mega-cap technology.

The pivot also reflects a broader reassessment of US assets. The Dutch central bank moved 86 metric tons of gold from New York and Ottawa to London between March and August, and gold has climbed about 25 percent over 12 months to near $4,430 an ounce. Finance minister Jens Stoltenberg said in April the fund had "no plans to reduce U.S. exposure," a stance the NBIM letter now challenges.

A Benchmark Built on Debt, Not GDP

NBIM wants to rebuild its index on the Bloomberg Global Aggregate Bond Index with government and other developed-market bonds each near half, and to weight government debt by outstanding market value rather than issuer GDP, following other large sovereign funds. The change would cut global government-bond exposure by roughly $106 billion, with Japanese holdings rising about $20 billion.

The proposal remains a recommendation. A full report is due in January, and the finance ministry will present final recommendations to parliament in spring 2027, leaving any actual asset moves more than a year away. For investors, the direction offers a template: with government yields at multi-year highs, institutional capital is trading similar credit quality for higher coupons, and agency MBS is a core vehicle for that trade. Retail investors can tap the same exposure through funds such as the iShares MBS ETF and the Vanguard Mortgage-Backed Securities ETF.

This article is for informational purposes only and does not constitute investment advice.