Illustrative · synthetic data · not a client strategy
Performance reconstruction extract
Perpetual-futures strategy — the gross headline weakens after implementation.
- Question
- At the proposed synthetic size, how much of the gross result remains after explicitly modeled implementation drag?
- Setup
- 12 generic perpetual contracts · 730 synthetic daily observations · dollar-neutral 1.0× gross exposure · no real tokens, venues, managers, or dates.
- Reconstruction
- Weights use prior-day synthetic signals; daily P&L uses next-day synthetic returns. Fees and spread/slippage, position-weighted funding, and liquidity impact are applied from synthetic trade and position ledgers.
- Conventions
- Annualized mean return = 365 × daily mean; Sharpe uses a 0% cash hurdle and √365; max drawdown uses compounded daily returns.
| Stage | Annualized mean | Sharpe | Max drawdown |
|---|---|---|---|
| Synthetic reported gross | +30.2% | 1.74 | −15.4% |
| After fees + spread/slippage | +23.8% | 1.37 | −16.5% |
| After funding ledger | +20.7% | 1.20 | −16.9% |
| Reproduced net incl. liquidity impact | +14.2% | 0.82 | −18.0% |
Annualized synthetic drag: fees + spread/slippage −6.4 pp; funding −3.1 pp; model-based liquidity impact −6.5 pp. Average one-way turnover 28.4%; synthetic trade/ADV participation median 0.42%, 95th percentile 1.78%.
Declared synthetic schedules. Fee 1.5 bp + base spread/slippage 1.0 bp + 0.6 bp × clipped prior-day volatility state, per absolute traded weight; funding 1.0 bp × current synthetic signal + a normal shock with σ = 0.4 bp; liquidity impact 32.5 bp × √(synthetic trade/ADV participation).
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