Our Methodology

How we build, test, and validate data-driven seasonality strategies for TSP, Fidelity IRA, and Vanguard IRA investors.

Our Approach

At Apex Equity, we believe investment decisions should be driven by data, not emotions or market commentary. Our strategies are built on a systematic, quantitative approach that analyzes decades of historical fund performance to identify recurring seasonal patterns.

We don't predict the future. We identify patterns that have persisted across multiple market cycles — bull markets, bear markets, recessions, and recoveries — and build allocation rules that capitalize on these patterns.

Backtesting Methodology

Data Collection

We collect and maintain historical daily price data for all funds in our coverage universe:

Data is sourced from official fund providers and verified for accuracy. We account for dividends, distributions, and fund splits.

Strategy Generation

Our scanner engine systematically generates and tests thousands of possible allocation strategies:

  1. Define the allocation universe: Which funds can be held in each calendar month
  2. Generate strategy candidates: Every possible monthly fund rotation combination
  3. Apply realistic constraints: Account for transfer limits (TSP allows 2 interfund transfers/month), settlement periods, and execution timing
  4. Backtest against historical data: Simulate each strategy's performance over the full historical period

Performance Metrics

Every strategy is evaluated across multiple dimensions, not just raw returns:

Important: Past Performance Disclaimer

All backtested results show what would have happened historically. Past performance does not guarantee future results. However, the seasonal patterns underlying our strategies are driven by structural market factors (tax cycles, institutional fund flows, behavioral patterns) that have persisted for decades.

Strategy Filtering

Not all strategies make the cut. We apply strict filters to ensure quality:

Why Seasonality Works

Seasonal patterns in financial markets aren't random — they're driven by well-documented, recurring factors:

These factors are structural, not random. They've persisted across decades of data because they're driven by institutional rules, tax codes, and human behavior — none of which change quickly.

Technology Stack

Our backtesting and scanning platform is built in-house using:

About the Team

AE

Apex Equity Research Team

Our team combines expertise in quantitative analysis, software engineering, and financial markets. We are passionate about making data-driven investment strategies accessible to everyday investors — particularly federal employees and military members who have access to the TSP and IRA retirement accounts.

We built Apex Equity because we saw a gap: powerful institutional-grade backtesting and seasonal analysis tools existed for Wall Street, but nothing comparable was available for TSP and IRA participants. Our mission is to bridge that gap.

Data Sources & References

Primary Data Sources

  • TSP Fund Prices: Official Thrift Savings Plan daily share price data (tsp.gov)
  • Fidelity Fund Prices: Historical NAV data from Fidelity Investments
  • Vanguard Fund Prices: Historical NAV data from The Vanguard Group
  • Economic Data: Federal Reserve Economic Data (FRED)

Academic Research on Seasonality

  • "Sell in May and Go Away": Bouman, S. & Jacobsen, B. (2002). The American Economic Review, documenting the persistent Halloween effect in equity markets
  • "The January Effect": Rozeff, M.S. & Kinney, W.R. (1976). Journal of Financial Economics, establishing the small-cap January premium
  • "Stock Market Seasonality": Jacobsen, B. & Marquering, W. (2008). Journal of Banking & Finance, confirming seasonal patterns across 37 countries
  • "Calendar Effects in Stock Markets": Lakonishok, J. & Smidt, S. (1988). Journal of Financial Economics, documenting persistent calendar anomalies over 90 years of data

Regulatory & Disclosure

  • Apex Equity, LLC is not a registered investment advisor and does not provide personalized financial advice
  • All strategies are for educational and informational purposes
  • Past performance does not guarantee future results
  • Users should consult a qualified financial advisor before making investment decisions
  • TSP rules and contribution limits are subject to change — verify current limits at tsp.gov