Why the TSP F Fund hasn’t delivered the expected risk/return tradeoff as interest rates shift

The article discusses how the Thrift Savings Plan’s F Fund (bond index fund) was intended to provide modestly higher returns than the G Fund in exchange for more risk, but its performance is heavily influenced by interest-rate trends. It highlights expert views that a prolonged period of declining rates may be unlikely, which matters for participants using the F Fund for diversification or stability.