iShares Core U.S. Aggregate Bond ETF Sees Inflows as 401(k) Millionaires Hit 665,000
Fewer than 7% of retirement savers hold 100% equity, boosting inflows to the iShares Core U.S. Aggregate Bond ETF as savers seek stability in volatile markets. Record 401(k) millionaires reached 665,000 at end-2025 with balances up 11% to $146,100 during strong market gains and a 14.2% contribution rate.
1. Record Growth of 401(k) Millionaires
Data through end-2025 show 401(k) millionaires climbed to 665,000, with average balances up 11% to $146,100 following a 17% gain in the S&P 500, a 20% rise in the Nasdaq Composite and a 13% return for the Russell 2000. Savers maintained discipline with an average contribution rate of 14.2%, including employer matches, and nearly 40% of workers increased their savings rates during the year.
2. iShares Core U.S. Aggregate Bond ETF Demand
The iShares Core U.S. Aggregate Bond ETF has seen rising inflows as fewer than 7% of retirement savers maintain 100% equity exposure. This fixed-income vehicle is being used to reduce portfolio volatility and provide stability for investors approaching retirement.