Manager of Norway's USD 2.3tln sovereign oil fund has proposed an overhaul of its government bond portfolio that could see it cut its holdings of US Treasuries by about USD 80bln as it looks to other types of debts to try to boost returns, according to FT

Periodic benchmark reviews by the largest sovereign wealth funds have historically been the mechanism through which shifts of this size occur, and they tend to be implemented gradually over an extended horizon rather than executed as outright sales, which is what distinguishes them from discretionary divestment. When funds of this scale have altered their fixed income reference indices in the past, the market effect has typically come through the flow differential at the margin over months, not through a repricing event, since index providers and trustees phase changes and the peer set of trackers follows with a lag. The stated rationale, substituting toward other debt types to raise return, fits the established pattern of these funds seeking credit, securitised, or higher-yielding sovereign exposure where duration is roughly maintained but spread product is added. What is worth watching is the formal index decision and its phasing schedule, since a proposal from fund management is not the same as an approved benchmark change, and such proposals have on previous occasions been diluted or delayed at the approval stage. The relevant channel is persistent supply of Treasuries into the market from one of the largest single holders, which at the margin weighs on the belly and long end of the UST curve while supporting the sectors the fund rotates into. As a proposal rather than a decision, the signal is directional and its weight depends on how quickly governance converts it into an index change.