All five Thrift Savings Plan investment funds had up months in September, with the small capitalization (S) fund leading the way with a 3.92 percent gain, followed by the international stock (I) fund, 2.05 percent, the common stock (C) fund, 1.11 percent, the government securities (G) fund, 0.38 percent, and the bond (F) fund, 0.29 percent. In terms of 12-month returns, the I fund leads with a 21.63 percent gain, followed by the S fund, 18.21 percent, C fund, 13.87 percent, G fund, 4.34 percent, and F fund, 3.61 percent.