TSP funds continued their upward swing in June

For the first time since January, every portfolio in the federal government’s 401(k)-style retirement savings program increased in value last month.

Leading the way was the Thrift Savings Plan’s S Fund, which is made up of small- and mid-size businesses and gained 5.40% in June. The boon was enough to take the S Fund’s 2025 performance back into the black for the first time since January, gaining 2.11% since the start of the year.

The common stocks of the C Fund gained 5.08% last month, bringing its gains since January up to 6.18%. And the international (I) fund grew 3.73%. Unfettered by the market swings that accompanied President Trump’s tariffs earlier this year, the I Fund has grown 18.69% so far in 2025.

The fixed income (F) fund grew 1.54% in June, bringing its 2025 performance to 4.02%. And the G Fund, which is made up of government securities, increased by it statutorily mandated rate of 0.37%. So far this year, the G Fund has grown 2.22%.

Likewise, each of the TSP’s lifecycle (L) funds, which shift toward more conservative investments as participants get closer to retirement, gained value last month. The end of June also marked the rolling of the L 2025 Fund into the L Income Fund, as well as the creation of the L 2075 Fund.

In June, the L Income Fund gained 1.57%; L 2030, 3.00%; L 2035, 3.26%; L 2040, 3.51%; L 2045, 3.73%; L 2050, 3.95%; L 2055, 4.61%; L 2060, 4.61%; L 2065, 4.62%; and L 2070, 4.61%.

So far this year, the L Income Fund has gained 4.55%; L 2030, 7.17%; L 2035, 7.62%; L 2040, 8.06%; L 2045, 8.44%; L 2050, 8.79%; L 2055, 9.88%; L 2060, 9.88%; L 2065, 9.88%; and L 2070, 9.90%.