Full Breakdown
Thrift Savings Plan Sees Mixed Returns in December 2025
1/6/2026, 8:33:14 PM
Overview of TSP Performance
The Thrift Savings Plan (TSP), the federal government’s 401(k)-style retirement savings program, reported mixed financial results for December 2025, marking the second consecutive month of lackluster returns. The international stock I Fund led the performance with a 3.04% increase for the month, contributing to an impressive 32.45% growth for the year. In contrast, the common stock C Fund saw minimal improvement at 0.06%, culminating in a 17.85% annual gain. The small- and mid-size business S Fund experienced a decline of 0.53% in December, resulting in an 11.38% increase for the year. The fixed income F Fund decreased by 0.26% last month, finishing the year with a 7.21% gain, while the government securities G Fund grew by 0.35%, totaling a 4.44% increase for 2025.
Lifecycle Funds Performance
The TSP’s lifecycle (L) funds, which adjust their investment strategies as participants approach retirement, exhibited positive returns across the board. The L Income Fund, aimed at those already withdrawing funds, increased by 0.51% in December, with a total growth of 9.36% for the year. Other lifecycle funds, such as L 2030 through L 2070, reported year-end returns ranging from 15.17% to 21.89%. Notably, the L 2055 and later funds, which are more growth-oriented, achieved returns nearing 22%.
Factors Influencing Performance
The strong performance of the I Fund can be attributed to favorable global market conditions, including easing inflation and solid earnings expectations, which have positively impacted overseas growth and currency effects. Conversely, the C Fund's moderate gains were hindered by high valuations, while the S Fund faced challenges from elevated interest rates and tighter financing conditions.
Official Statements & Responses
The TSP's overall performance reflects a continued confidence in equities, as evidenced by the concentration of assets in the C Fund and L Funds, which collectively accounted for a significant portion of the $1.071 trillion invested in the TSP. The favorable bond environment contributed to the best combined performance of the F and G Funds in several years, indicating a positive shift in investor sentiment.
Criticism & Opposition
Despite the overall positive returns, some analysts caution that the mixed results in December may signal potential volatility ahead. Concerns have been raised about the sustainability of the I Fund's extraordinary gains, particularly in light of global economic uncertainties.
Conflicting Reports & Gaps
While the TSP reported positive year-to-date returns across all funds, discrepancies exist regarding the specific performance metrics of the S Fund, with some sources indicating varying levels of impact from market conditions. Additionally, the lack of a full-year figure for the newly introduced L 2075 Fund leaves a gap in understanding its performance trajectory.
Verbatim Quotes
“45% Despite mixed results in December, all five individual TSP funds finished 2025 with positive YTD returns.” — Fedweek
