Praxis — audited systematic strategies, in your trading stack

Abstract

Praxis is a library of audited systematic trading strategies. Published claims overstate themselves, routinely and measurably [2, 3]. We screened 2 million research records, identified 6,400 strategy papers by name, with over 100 new a month in 2026, and rebuild the most consequential to the paper’s own spec. Each is re-run on bias-free data, out of sample, net of all real costs, across crisis regimes, accounting for overfitting [4] and luck [1]. Every claim leaves validated, overstated, or fails, and its code integrates into IBKR, Bloomberg or LEAN.

Keywords: replication · out-of-sample · deflated Sharpe · alpha decay · MCP

0 · Abstract§0 1 · Findings§1 2 · Methodology§2 3 · Access§3 4 · References§4

Figure 1. The corpus by family and asset class: all 22 families. Shading ∝ papers. A · marks none. n = 1,684.

1Findings

**Table 1.** Claimed vs. measured, out-of-sample, net of costs.
#	Paper	Asset	Claimed	Measured	Claimed → Measured	Verdict
1	The Volatility Edge — dual VIX-ETN signal	Vol	Sharpe 1.00	1.03	~~Sharpe 1.00~~→ 1.03	validated
2	Network momentum across asset classes	X-asset	Sharpe 1.51	0.62	~~Sharpe 1.51~~→ 0.62	overstated
3	Lazy factor + probability weighting	Gold·BTC	$136,216	$4,374	~~$136,216~~→ $4,374	fails
⋮	More papers can be viewed in Your Library →

(1)

2Methodology

Definition 1 (Measured edge). The measured edge is the paper’s own headline statistic, recomputed from a full re-implementation under three conditions: (i) out of sample, (ii) net of real costs, (iii) on survivorship-clean, point-in-time data. Table 1 reports it beside the claim.

Theorem 1 (Selection). Among N backtests of noise, the expected best Sharpe ratio grows as √(2 ln N) [1]. Publication reports the maximum, so a claimed edge exceeds the true one in expectation. The excess is identified only by re-measurement under Definition 1, and Eq. (1) turns the gap into the verdict.

Remark. The verdict is computed, not argued.

Figure 2. What survives each gate. 100 claims enter, ≈12 leave beta-adjusted. Illustrative until the audited set is large enough to publish measured rates · full gate definitions ↗

3Access

**Table 2.** Access — reader is free, no card; Praxis Pro is £29 a month.
	Reader — free	Praxis Pro — £29/mo
A library of clustered systematic trading strategies	5 papers	6,400
Strategy validation reports under live trading conditions	5	all
Reproduction code, integrated with Bloomberg, IBKR, etc.	5	all
Integration with your AI agent — Claude, ChatGPT, Cursor	5	full corpus

Become a member — £29/mo ↗full corpus · every reproduction · MCP on all 6,400

$ subscribe --tier reader$ praxis --status

$ praxis --chat

works in Claude · ChatGPT · Cursor · any MCP host

4References

[1]Bailey, D. & López de Prado, M. The Deflated Sharpe Ratio. J. Portfolio Management, 2014.

[2]Ioannidis, J. Why Most Published Research Findings Are False. PLoS Medicine, 2005.

[3]Harvey, C., Liu, Y. & Zhu, H. …and the Cross-Section of Expected Returns. Review of Financial Studies, 2016.

[4]Bailey, Borwein, López de Prado & Zhu. The Probability of Backtest Overfitting. J. Computational Finance, 2017.