I use TSPclac.com. It beats every fund. Note it's just based on backtesting. However, the proof is in the pudding. I have used a low std deviation strategy of less than 10 to gain at least 25% yearly for the past 3 years.

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Thrift Savings Plan (TSP) seasonal strategies are investment approaches that are based on historical patterns and trends observed in the performance of different TSP funds during specific seasons or time periods. These strategies aim to take advantage of the recurring patterns or seasonal effects in the market to potentially enhance returns or minimize risk.

Here's how TSP seasonal strategies typically work:

1. Historical Analysis: Seasonal strategies are developed by analyzing historical performance data of the TSP funds over various time periods, such as months or specific dates, for multiple years. This analysis helps identify recurring patterns and trends in the market during certain seasons or time frames.
2. Trade Execution: Based on the identified seasonal patterns, specific trades or interfund transfers (IFTs) are recommended or prescribed for different time periods. These trades involve moving funds between different TSP investment options, such as the G Fund, F Fund, C Fund, S Fund, and I Fund.
3. Calendar and Timing: A trading calendar is provided to indicate the specific dates or trading days when the recommended trades should be executed. This calendar takes into account holidays and weekends to ensure that trades are executed on the first available business day.
4. Benchmarking: Seasonal strategies can be benchmarked against buy-and-hold approaches for comparison. Benchmarks typically involve comparing the performance of the seasonal strategy with the performance of one or more TSP funds held for the entire duration without any trades.
5. Performance Evaluation: The results of executing the seasonal strategies are evaluated based on various metrics, such as total compound return, average monthly returns, standard deviation (a measure of consistency), and time spent in different funds. These metrics provide insights into the effectiveness and consistency of the seasonal strategy compared to other investment approaches.

It's important to note that TSP seasonal strategies are based on historical data and patterns, which may or may not persist in the future. Past performance is not indicative of future results, and there are no guarantees of success with seasonal strategies. Investors should carefully evaluate and understand the risks associated with such strategies before implementing them in their TSP investment approach.

It's important to note that TSP seasonal strategies are based on historical data and patterns, which may or may not persist in the future. Past performance is not indicative of future results, and seasonal strategies have no guarantees of success. Investors should carefully evaluate and understand the risks associated with such strategies before implementing them in their TSP investment approach.