May was a good month for every fund in the Thrift Savings Plan. New data from the Federal Retirement Thrift Investment Board shows all 16 accounts returned positive month over month results. The C Fund saw the most with 5.26% while five of the L funds also enjoyed 5% returns. For the year, the "I” fund remains the big winner, growing by more than 16%. Overall, 11 funds are producing returns of more than 10% for 2026. 

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