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Alight Solutions 401(k) IndexTM: December 2025 Observations

Alight Solutions 401(k) IndexTM: November 2024 Observations

December was a slow trading month for retirement plan investors, according to the Alight Solutions 401(k) IndexTM. On average, 0.007% of balances were traded daily, the lowest level since September 2023. There were no days of above- normal1 trading activity.

December observations:

 

  • On average, 0.007% of 401(k) balances were traded daily.
  • 16 of 22 days favored fixed income funds.



The Alight Solutions 401(k) Index statistics for the month of December:


Index statistics

December

2025 YTD

Total transfers as percentage of starting balance

0.09%

1.93%

# Fixed days

16 (73%)

192 (77%)

# Equity days

6 (27%)

58 (23%)

# Above-normal days1

0

44


Inflows and outflows during the month of December:

•    Bond funds received more than half of all net trading inflows.

•    Outflows were primarily from company stock and large U.S. equity funds.

Asset classes with most trading 

inflows in December

Percentage of inflows

Index dollar value ($mil)

Bond funds

58%

$149

International equity funds

15%

$37

Target date funds2

13%

$33

Asset classes with most trading 

outflows in December

Percentage of outflows

Index dollar value ($mil)

Company stocks

37%

$96

Large U.S. equity funds

27%

$71

Money market funds

16%

$42


December investment portfolios:

  • After reflecting market movements and trading activity, average asset allocation in equities increased from 73.1% in November to 73.2% in December.
  • 70.1% of contributions went to equities in December.

Asset classes with largest percentage

of total balance at the end of December

  Percentage of balance

Index dollar value ($mil)  

Target date funds2

31%

$92,794

Large U.S. equity funds

30%

$89,093

Company stock funds

7%

$21,871

Asset classes with most 

contributions in December

Percentage of contributions

Index dollar value($mil)

Target date funds2

50%

$603

Large U.S. equity funds

22%

$267

International equity funds

7%

$86


Returns for common indices

December

2025 YTD

Bloomberg Barclays U.S. Aggregate Bond Index

-0.15%

7.30%

S&P 500 Index

0.06%

17.88%

Russell 2000 Index

-0.58%

12.81%

MSCI All Country World ex-U.S. Index (net)

3.00%

32.39%

1  A “normal” level of relative transfer activity is when the net daily movement of participants’ balances, as a percent of total 401(k) balances within the Alight Solutions 401(k) Index™, equals between 0.3 times and 1.5 times the average daily net activity of the preceding 12 months. A “high” relative transfer activity day is when the net daily movement exceeds two times the average daily net activity. A “moderate” relative transfer activity day is when the net daily movement is between 1.5 and 2 times the average daily net activity of the preceding 12 months.

2 Target date funds also include the amounts in target risk funds. The amount in the target risk funds is less than 10% of the total.

Related Insights


Alight Solutions 401(k) IndexTM: Fourth Quarter 2025 Observations

Retirement plan trading was minimal throughout the fourth quarter of 2025, according to the Alight Solutions 401(k) IndexTM.

Alight Solutions 401(k) Index™: 2025 Observations

In many ways, 2025 highlighted the key drivers of trading activity in retirement plans. During the first half of the year, trading surged as stocks slipped into negative territory.

Alight Solutions 401(k) IndexTM: November 2025 Observations

Retirement investors maintained a careful approach to rebalancing in November with funds overwhelmingly shifting from company stock and U.S. equities to safer fixed income investments, according to the Alight Solutions 401(k) IndexTM.