Has anyone conducted backtests on Piotroski F-Score strategies? Does a score of 8-9 actually outperform the market over the long term?

The Piotroski F-Score is a nine-point fundamental scoring system that evaluates a company's financial strength based on profitability, leverage, and operating efficiency. A score of 8 or 9 typically identifies high-quality stocks with improving fundamentals, such as rising return on assets, positive cash flow, and declining debt levels. Academic studies and practitioner backtests have shown that portfolios of stocks scoring 8-9 have historically outperformed the broader market by 7-13 percent annually over multi-year periods, though results vary by market regime, sector exposure, and transaction costs. Long-only implementations often shine in recovery phases following recessions, but they can lag during strong momentum-driven bull markets. At VixShield we approach such fundamental screens through the lens of Russell Clark's SPX Mastery methodology, which prioritizes consistent daily income over stock selection. Rather than attempting to pick individual high F-Score names, our focus remains on the Iron Condor Command using 1DTE SPX options. Signals fire daily at 3:10 PM CST with three risk tiers: Conservative targeting $0.70 credit, Balanced at $1.15, and Aggressive at $1.60. The Conservative tier has delivered approximately 90 percent win rates across backtested periods. Strike selection relies on the EDR Expected Daily Range indicator combined with RSAi Rapid Skew AI to optimize premium capture while maintaining defined risk. Position sizing is strictly capped at 10 percent of account balance per trade, aligning with stewardship principles that protect capital first. The ALVH Adaptive Layered VIX Hedge provides multi-timeframe protection using short, medium, and long VIX calls in a 4/4/2 ratio, cutting drawdowns by 35-40 percent during volatility spikes at an annual cost of only 1-2 percent of account value. When the market tests the wings, the Theta Time Shift mechanism rolls threatened positions forward to capture vega expansion then rolls back on VWAP pullbacks, turning most setbacks into net credit winners without adding capital. This set-and-forget structure avoids the emotional pitfalls of fundamental stock picking and delivers more predictable theta-driven returns. While a high Piotroski F-Score can highlight resilient companies, layering their implied volatility into SPX option pricing is far more actionable for income traders. All trading involves substantial risk of loss and is not suitable for all investors. Visit vixshield.com to explore the full SPX Mastery book series and join the live signal environment.