Marsh, a large company that advises investors on where to put their money, is telling some of its clients to increase how much they hold in U.S. Treasury bonds—essentially loans to the U.S. government. This recommendation comes because Treasury bonds are currently paying higher interest rates than they have in recent years. When you lend money to the government through a Treasury bond, you get paid back with interest; the higher that interest rate is, the more attractive the investment becomes.
For major investors managing huge sums of money, even a small increase in interest rates can mean significant returns over time. Marsh's decision to bump up Treasury allocations signals that professional investors believe this is a favorable moment to lock in these higher rates before they potentially fall again.