Fedweek

The TSP funds produced mixed results in September, with the international stock I fund gaining 0.91 percent and the large company U.S. stock C fund up 0.57 percent, but the small company stock S fund dropping 1.76 percent and the bond F fund declining 0.62 percent; the government securities G fund rose 0.24 percent.

The September returns for the lifecycle L funds, all gains were: Income, 0.21; 2020, 0.22; 2030, 0.23; 2040, 0.22; 2050, 0.21. For year-to-date, last-12-month returns and TSP insight, visit https://www.fedweek.com/thrift-savings-plan/

See also, F Fund, G Fund and Rising Interest Rates:
On Wednesday, September 26, the U.S. Federal Reserve announced a 0.25% increase in key interest rates for the nation. It will now be set at 2% to 2.25%, with further increases planned in 2019, which may impact the fixed-income F Fund since bond prices go down as interest rates go up. (The government securities G Fund is also impacted but to a lesser extent since by law principal invested in that fund is protected from loss although it carries the risk of too low of a return.)