momentum-code: Consistent Cross-Cycle Returns, but Validation Gate Holds

Strategy Thesis

momentum-code operates on a straightforward premise: at each scheduled run, rank the 24-name large-cap universe by daily price momentum, buy the top positive movers, and cap individual position size to limit concentration risk. The universe spans mega-cap technology (AAPL, MSFT, NVDA, GOOGL), financials (JPM, BAC, V, MA), healthcare (JNJ, UNH, PFE, ABBV), consumer staples and discretionary (PG, KO, WMT, COST, MCD, NKE, HD), industrials (CAT, HON), and energy (XOM, CVX), plus DIS. It is a rules-based, low-turnover approach that leans into short-term price persistence without straying into speculative names.

Backtest Performance

Over the 451-day backtest window, momentum-code returned 19.76% (10.6% CAGR) against a total fee drag of just $5.00 — a near-negligible friction profile given only five executed trades. The Sharpe ratio sits at 0.65, which is respectable for a buy-and-hold-leaning momentum book but not exceptional. The headline risk figure to watch is the 20.48% maximum drawdown, which is substantial relative to the return generated and points to a strategy that can sit deeply underwater during trend reversals.

Win rate is logged at 0% — a metric that deserves context. With only five trades recorded, the figure reflects an incomplete sample rather than a losing track record; the strategy holds positions rather than cycling rapidly, so realized P&L events are rare by design.

Walk-Forward Validation

The more instructive picture comes from the four-fold walk-forward analysis:

All four folds closed positive — a meaningful signal of strategy consistency. The out-of-sample Sharpe of 1.93 and OOS return of 13.71% in fold 4 (the most recent period) are the strongest in-sample analogs available and suggest the strategy's edge has not decayed. Folds 1 and 3 show particularly clean risk-adjusted profiles with Sharpe ratios above 2 and drawdowns under 7%.

Fold 2 is the outlier: a 3.27% return with a 16.55% drawdown and Sharpe of 0.46 — the January-to-July 2025 window, which broadly encompassed the tariff-driven market volatility. This fold alone likely anchors the full-period Sharpe at 0.65 rather than the 2.0+ seen in stronger periods.

Validation Gate: Failed on PSR/DSR

Despite the positive fold sweep, momentum-code has not passed the platform's validation gate. The Probabilistic Sharpe Ratio (PSR) of 0.811 and Deflated Sharpe Ratio (DSR) of 0.338 tell the core story: with only six trials and a short live history, there is insufficient statistical evidence that the observed Sharpe of 0.65 is not noise. The DSR in particular — which penalizes for multiple testing across strategy variants — remains well below typical acceptance thresholds.

This is the right call. A low trade count inflates uncertainty bands; the platform is correctly applying a higher bar before committing real capital.

Recent Activity

The strategy's last confirmed trades executed on May 31 – June 1, entering BAC, HON, MSFT, NVDA, and XOM across two runs. Since then, the June 10–17 daily runs have recorded zero executions and between one and three rejections per session, with cash locked at $608.79. Portfolio value has ranged from $9,534 to $9,712 over that window, reflecting mark-to-market moves in the existing book rather than new activity.

The rejection pattern is consistent with the position-cap logic working as designed: the strategy is identifying potential movers but declining to add when existing exposure already meets the size ceiling.

Outlook

momentum-code's core thesis is intact. Cross-cycle consistency (four-for-four positive folds) and a strong recent OOS period argue for continued monitoring. The path to clearing the validation gate runs through more executed trades — lengthening the live track record is the most direct way to improve PSR and DSR confidence intervals. The one structural concern remains fold 2's drawdown profile; any market regime shift toward sustained volatility could revisit that pattern.