Multi-Asset Same-Venue Extreme-Funding Cash-and-Carry Basket (Long Binance Spot + Short Binance USD-M Perp per Asset, Each Gated on Its OWN Extreme Funding, Delta-Neutral, Continuous-Coverage Reframe of the Validated Single-Asset Carry)

A MARKET-NEUTRAL, MULTI-INSTRUMENT funding-carry BASKET that deploys the factory's ONE validated, fee-clearing, delta-neutral edge — the SAME-VENUE extreme-funding cash-and-carry (long BINANCE_SPOT + short BINANCE USD-M perp, gated to EXTREME positive funding) — across ~8 deep-funding-history Binance majors (BTC, ETH, SOL, BNB, XRP, ADA, DOGE, LINK), each leg spot-hedged on the SAME exchange. This is the explicit, repeatedly-escalated Research-Lead reframe of the abandoned single-asset versions (BtcCashAndCarryFundingArbExtreme4H et al.): those were genuinely sound and fee-clearing (Sharpe 7.84, PF 1.15, real two-sided drawdowns, neutral book) but FAILED only because single-asset BTC/ETH extreme funding is REGIME-DORMANT (clustered in 2020-2021), leaving the recent walk-forward/holdout windows with ZERO trades. POOLING many assets fixes exactly that and nothing else: different alts spike funding at different times, so in essentially every window SOME asset is in an extreme-funding regime → continuous, walk-forward/holdout-validatable trading while preserving the unchanged fee-clearing EXTREME gate. The book is delta-neutral per asset (equal base-quantity matched legs) and market-beta-stripped overall, giving a return stream uncorrelated with the portfolio's directional momentum books (which the 85.4%-long-only portfolio structurally lacks). It is SAME-VENUE (Binance spot + Binance perp), avoiding the 6×-confirmed cross-venue basis/funding-spread fee-domination wall, and uses only credited linear-venue funding (no COIN-M, no Hyperliquid, no cross-venue differential).

The explicit, repeatedly-escalated reframe of the abandoned single-asset extreme-funding cash-and-carry (BtcCashAndCarryFundingArbExtreme4H et al.): those were genuinely sound and fee-clearing (Sharpe 7.84, PF 1.15, real two-sided drawdowns, neutral book) but FAILED only because single-asset BTC/ETH extreme funding is REGIME-DORMANT (clustered in 2020-2021), leaving recent walk-forward/holdout windows with ZERO trades. Pooling 8 assets fixes exactly that and nothing else: different alts spike funding at different times, so in essentially every window SOME asset is in an extreme-funding regime -> continuous, validatable trading, while preserving the unchanged fee-clearing EXTREME gate. Per-asset gating and accrual use funding_rates_by_instrument so each leg is charged/gated its OWN funding, not the primary symbol. The book is delta-neutral per asset (equal USD notional) and market-beta-stripped overall, giving a return stream uncorrelated with the 85.4%-long-only portfolio. SAME-VENUE (Binance spot + Binance perp) avoids the 6x-confirmed cross-venue basis/funding-spread fee-domination wall, and uses only credited linear-venue funding (no COIN-M, no Hyperliquid, no cross-venue differential). capital_frac=0.11 across 8 books caps total spot notional near 1x equity (spot CASH, no leverage); leverage=1.0 and sizing uses capital_frac not leverage, so no unused-leverage gate triggers. 3 edge parameters resist walk-forward overfitting.

The multi-asset reframe is empirically falsified for the second time (5-asset and now 8-asset), and this instance is near-redundant with a sibling already iterating on the only remaining fix. Funding IS credited and the mechanism clears fees (sum funding +$72,705 vs -$21,532 basis residual, ~+$35k net realized, market-neutral), but pooling 8 majors did NOT achieve the promised continuous coverage: 84% of entries fall in 2020/2021 and there are ZERO in 2022/2025/2026 (last trade 2024-12), identical to the 5-asset version (b374fac1). Major-coin EXTREME funding (>=0.0005/8h) is correlated and regime-clustered — all majors spike together in bull manias and all go quiet otherwise — so adding assets does not decorrelate the funding regime. Consequently the recent walk-forward/holdout windows are empty, which is the exact zero-OOS-trades failure that abandoned the single-asset BTC 4H sibling post-optimization (0942f308: holdout_sharpe 0.0, is_overfitted with [0,0,13] OOS). Not iterate: the only remaining lever — verify whether funding supplementary data is truncated at ~end-2024 (data bug, fixable) vs genuinely compressed (structural), and if data is complete, lower the extreme gate to catch moderate alt-funding in recent regimes while confirming per-trade carry still clears the ~0.20% two-leg fee — is ALREADY prescribed and pending on the 5-asset sibling (b374fac1); iterating this 8-asset duplicate would run the same data-coverage + lower-threshold experiment a second time in parallel. If the sibling's data/threshold investigation revives the family, it revives there; this redundant instance should be retired. FAILURE PATTERN (now confirmed across single-asset, 5-asset, and 8-asset): same-venue extreme-funding cash-and-carry clears fees and is genuinely neutral, but the fee-clearing EXTREME gate fires only in 2020/2021-style bull manias across ALL majors simultaneously (correlated funding), so no number of pooled assets produces 2025/2026 trades — the recent holdout is empty regardless of basket size, and a high full-period Sharpe cannot rescue it. The mechanism belongs on a richer-funding instrument with a lower gate (the ETH spot-perp sibling that promoted), not on a wider extreme-gated major basket.

Market-neutral multi-instrument SAME-VENUE extreme-funding cash-and-carry basket across 8 deep-funding-history Binance majors (BTC, ETH, SOL, BNB, XRP, ADA, DOGE, LINK). For each asset, when its OWN 8h Binance USD-M perp funding (read per-leg from the funding_rates_by_instrument supplementary series, fallback funding_rates) is EXTREME (>= funding_entry, default 0.05%/8h ~= 54.75% APR) the strategy opens an independent delta-neutral cash-and-carry: LONG the spot (BINANCE_SPOT) + SHORT an equal-USD-notional USD-M perp (BINANCE). Each 8h settlement the perp short receives the rich funding while the matched spot long cancels price exposure; the book is held only while that asset funding stays elevated (closed when funding <= funding_exit, default 0.01%/8h, or a frozen max-hold / per-book PnL kill switch fires). Books are fully independent per asset. All 16 legs (8 spot + 8 perp) run on 4-HOUR bars (cleanly straddling the 8h settlement) and are managed uniformly from calculate_signal via direct per-leg order submission; the base single-position hooks are intentionally inert. calculate_signal returns the max basket funding (continuous, varying). 3 edge parameters (funding_entry, funding_exit, capital_frac); asset list, smoothing and backstops frozen. With no funding data, no book opens (no price-pattern fallback).