Vanguard and Fidelity have both put new numbers on what they expect from U.S. stocks over the long run, and the message is subdued. Vanguard's 10-year outlook calls for average annual returns of 4.8% to 6.8%, while Fidelity's 20-year forecast puts annualized returns at 5.8% and about 3.2% after inflation.
That is why the forecasts matter now for people saving through a 401(k) or IRA. The comparison point is hard to miss: the S&P 500 has averaged roughly 10% a year since it launched in 1957, a pace that shaped many retirement assumptions and helped fuel expectations for steady account growth.
Brianna Rodgers said that if returns come in below that historical pattern, savers could be caught off guard by how slowly their retirement cushion grows. She said people who expect consistent market gains may see that difference compound over a set number of years, leaving less money than planned or forcing them to work longer to keep saving.
Her warning lands on the central friction in these forecasts. Lower projected returns can mean more than a smaller nest egg; Rodgers said people nearing retirement may decide to delay leaving work, or even rethink investment and withdrawal plans and day-to-day spending if the market does not cooperate as expected.
Still, Rodgers also noted that market projections are never a promise. The forecasts from Vanguard and Fidelity may prove right, but they also may not, and that uncertainty is exactly what makes the new numbers important for savers trying to map out the next decade or two.
