The Thrift Savings Plan’s common stock (C) fund suffered a losing month in January, dropping 5.03 percent to bring the fund’s 12-month return down to 10.25 percent. The F fund also had a losing month, down 0.34 percent for a 12-month loss of 1.88 percent. The G fund returned 0.56 percent for a 12-month gain of 6.13 percent. Meanwhile, money in the G fund is being invested at a 6.75 percent annual rate in February.