Norway's Sovereign Wealth Fund Proposes $80 Billion Shift from U.S. Treasuries to Mortgage-Backed Securities

This proposal reflects broader trends in global investment strategies amid rising U.S. debt and geopolitical uncertainties.

• Norges Bank Investment Management proposed reallocating $80 billion from U.S. Treasuries to agency mortgage-backed securities.
• Government bond weighting in its fixed-income benchmark would drop from 70% to 50%, with U.S. Treasuries falling from 34.1% to 21.9%.
• The fund aims to enhance diversification and capture additional risk premiums while maintaining overall dollar exposure.

• U.S. national debt has surpassed $40 trillion, raising concerns about fiscal sustainability and investment risk.
• Global central banks are increasingly diversifying away from dollar assets, favoring gold and other alternatives due to liquidity and sanctions risks.
• Agency mortgage-backed securities are seen as a way to balance risk and return, providing exposure to prepayment risk rather than default risk.

On September 4, 2026, Norges Bank Investment Management (NBIM) submitted a proposal to Norway's finance ministry to adjust its bond index benchmark. This strategic shift involves reducing the allocation to U.S. government bonds from 34.1% to 21.9%, equating to an approximate divestment of $80 billion. The fund plans to increase its holdings in non-government U.S. debt, particularly agency mortgage-backed securities (MBS) backed by Fannie Mae, Freddie Mac, and Ginnie Mae.

This move is not just a simple reallocation; it reflects a calculated response to the current economic landscape. With U.S. Treasury yields hovering around 4.8% amid rising national debt and federal deficits projected near $2 trillion, the fund is seeking to enhance its risk-return profile. By shifting towards agency MBS, NBIM aims to capture additional risk premiums while maintaining a credit quality comparable to government bonds.

The rationale behind this strategy is multifaceted. First, the fund is responding to the increasing prepayment risk associated with MBS, which can offer higher yields compared to traditional government bonds. This shift allows the fund to diversify its fixed-income portfolio while keeping its overall dollar exposure stable at approximately 52.5%.

Moreover, the backdrop of declining shares of dollar assets in global central bank reserves indicates a growing concern among investors about the long-term viability of U.S. debt as a safe haven. The geopolitical landscape, characterized by shifting U.S. trade policies and reduced commitments to international alliances, further complicates the investment environment.

As a result, this proposal by NBIM may signal a broader trend among sovereign wealth funds and institutional investors to reassess their exposure to U.S. Treasuries. The implications of this shift could reverberate through global markets, influencing investment strategies in oil-exporting regions and beyond.

• Sovereign wealth funds: They may follow suit, adjusting their portfolios in response to perceived risks in U.S. Treasuries.
• Investors in U.S. assets: Increased volatility and shifts in risk premiums could affect returns.
• Mortgage-backed securities market: Increased demand for agency MBS could drive prices and yields.

• Market reactions: Monitor how U.S. Treasury yields respond to this proposal and any subsequent shifts in investor sentiment.
• Global investment trends: Watch for similar reallocations by other sovereign wealth funds, indicating a broader shift in asset allocation strategies.
• U.S. fiscal policy developments: Changes in government spending or debt management could impact the attractiveness of U.S. Treasuries.