SolSpotPerpFundingCarryDeltaNeutral1H

SOL Spot-Perp Funding Carry Market-Neutral Daily (Second-Asset Validation of BTC Funding-Carry Class, Cross-Venue Hedged)

Market-neutral spot-perp funding carry on SOL — a deliberate SECOND-INSTRUMENT VALIDATION of the same mechanism class currently being tested via BtcSpotPerpFundingCarryHedgedV3Daily. The analyst's most recent refined generalization explicitly states: 'True validation requires... (b) replicating positive expectancy on a SECOND instrument with the same implementation.' If BTC funding carry works at iter-2, validating on SOL (different liquidity tier, different retail dynamics, different funding regime) establishes the mechanism as a CLASS rather than instrument-specific edge — solving the exact failure mode that killed Pullback-in-Trend, Bull Flag, and cross-asset Donchian (all validated on one asset, failed cross-asset). SOL is the analyst's recommended second test bed (cited as 'pending walk-forward' in Donchian cumulative mapping). This hypothesis SIMULTANEOUSLY FILLS three under-represented portfolio buckets: (a) cross-venue (3.3% → ≥15% target), (b) market-neutral direction (8.8% → reducing 91.2% long-only), (c) pairs scope (13.0% → reducing 80.4% single). Distinct from BTC carry because: (1) different underlying, (2) SOL funding rates are MORE volatile and frequently more extreme than BTC (retail-driven), giving potentially HIGHER carry per dollar exposed, (3) SOL is a different liquidity tier so basis dynamics differ.

This is a deliberate SECOND-INSTRUMENT validation of the BTC funding-carry class (BinanceSpotPerpFundingCarryDeltaNeutral1H) requested by the analyst to establish the mechanism as a CLASS edge rather than a BTC-specific one. The implementation is intentionally identical to the BTC version (same 3 core parameters, same defaults, same delta-neutral construction and exit logic) so it is a true validation and not a re-fit — replicating positive expectancy on SOL with the same code is exactly what distinguishes a generalizable mechanism from single-asset overfitting that killed prior strategies. The PERP is the primary instrument because funding_rates supplementary data keys to SOLUSDT.BINANCE, guaranteeing the funding series is collected; the spot hedge is a same-timeframe extra leg so the base template's cross-leg alignment barrier feeds a contemporaneous spot price (no phantom basis). The spot leg is only ever bought then closed, respecting BINANCE_SPOT's long-only CASH constraint. It fills three under-represented portfolio buckets: cross-venue (spot+perp across BINANCE_SPOT/BINANCE), market-neutral direction, and pairs scope. SOL funding is more volatile and frequently more extreme than BTC (retail-driven), offering potentially higher carry per dollar exposed while the same thresholds keep the edge above the ~0.30% round-trip fee. leverage=1.0 because each leg is sized at 30% of equity (0.60 gross) and the carry comes from funding accrual, not amplified directional exposure.

Structural regime-decay of the funding-carry edge plus a SOL-specific capacity wall — not a code or crediting problem. Funding IS credited (+9,469 gross, confirmed in trade-level funding fields) and the hedge is genuinely delta-neutral (price PnL -6,262), so this is neither a funding-crediting bug nor a zero-trade error. The credited result is net -1.48% over ~6 years: funding is fully consumed by commission (2,756) + market impact (3,309) + price drift. The edge is a 2021 fossil even more concentrated than its BTC/ETH siblings — 2021 alone accounts for 88% of funding ($8,297/$9,469) and 67% of pairs, with ZERO qualifying trades in 2022, 2025, and 2026. SOL additionally fails capacity: impact_cost_pct 50.8% (impact eats half the gross edge) and capacity_usd just $387,677, so the carry is real only at toy scale. The three parameters (entry/exit funding threshold, basis stop) can only select which funding to trade; they cannot manufacture funding the market stopped paying post-2021, so no parameter region clears breakeven and optimization would overfit 2021. This hypothesis was framed as the SECOND-INSTRUMENT VALIDATION of the funding-carry class — and it CONFIRMS THE FAILURE: the class nets negative after costs on BTC (368a2e57), ETH, and now SOL, all with the same 2021-concentration signature, plus SOL is capacity-constrained. FAILURE PATTERN: spot-perp funding carry is a 2021-era fossil across instruments — credited funding nets slightly negative after fees/impact and the rich-funding trigger rarely fires post-2021; on lower-liquidity SOL, market impact (50%+ of gross) and a sub-$400k capacity make it strictly worse. The class does not generalize; stop validating it on additional single instruments — only a venue/instrument with PERSISTENT positive funding skew (not a major or a thin alt) could revive the mechanism.

Market-neutral spot-perp funding carry on SOL. When the SOLUSDT perp 8h funding rate is meaningfully positive (>=5bps/8h, crowded longs paying shorts), it opens a delta-neutral pair: SHORT SOLUSDT.BINANCE perp (collects funding) + LONG SOLUSDT.BINANCE_SPOT (neutralizes price exposure) in equal base quantity (net SOL delta ~= 0). The pair is held while funding stays elevated and closed when funding normalizes (<=1bp/8h), a 10-day basis-risk time cap is hit, or net pair PnL breaches a 5% basis-divergence stop. Realized PnL is dominated by accrued funding minus a fixed round-trip fee, not by SOL's direction. Uses 1-HOUR bars to act promptly on each 8h funding update.

Mechanism correctly implemented, funding IS credited (+9,469 gross to short-perp legs), hedge genuinely delta-neutral (price PnL only -6,262), max drawdown ~1.5%.

Trades match the hypothesis (short perp + long spot, equal qty, entries on positive funding).

Net negative AFTER credited funding: total_return -1.48% over ~6 years; funding +9,469 consumed by commission (2,756) + impact (3,309) + price drift (-6,262).

Edge is a 2021 fossil: 88% of funding and 67% of pairs from 2021 alone; ZERO trades in 2022, 2025, 2026. Funding above the 5bps/8h trigger essentially stopped occurring post-2021.

Severe capacity wall unique to SOL: impact_cost_pct 50.8% (market impact eats half of gross) and capacity_usd only $387,677 — the edge is real only at toy scale, a promotion blocker regardless of headline.

Headline rolling-Sharpe up to 6.5 is a per-leg/flat-equity artifact (overall Sharpe -0.06, PF 1.03); the 'second-instrument validation' confirms the family's failure rather than the edge.

toy-scale only

commission 2756 + impact 3309; plus -6262 price drift

net negative after credited funding

88% from 2021

SolSpotPerpFundingCarryDeltaNeutral1H ran the identical BTC carry implementation on SOL as a deliberate second-instrument test of whether funding carry is a class edge. The mechanism worked and funding was credited (+$9,469) on a tightly hedged ~1.5% drawdown book, but commission, impact, and price drift consumed it for a -1.48% net, with 88% of funding from 2021 and no qualifying trades after 2021 — and SOL added a fatal capacity wall, impact eating 50.8% of gross at just $387k capacity. The analyst ruled it structural regime decay rather than a code problem, noting the validation confirmed the class's failure across BTC, ETH, and now SOL with the flattering rolling Sharpe being a per-leg artifact. It ended after one iteration as abandoned, never advancing to optimization or risk review.

The intended second-instrument validation instead confirmed the funding-carry class fails: spot-perp carry now nets negative after costs on BTC, ETH, and SOL with the same 2021-concentration signature, and on lower-liquidity SOL a 50%+ impact cost and sub-$400k capacity make it strictly worse — stop validating the class on additional single instruments; only a venue/instrument with persistent positive funding skew could revive it.

It was abandoned at the pre-optimization backtest-review gate (verdict: abandon) due to structural regime decay plus a SOL-specific capacity wall — the rich-funding trigger essentially stopped firing after 2021 and market impact eats half the gross edge at sub-$400k capacity — so the three thresholds cannot manufacture funding the market no longer pays, and optimization and all later stages were never reached.

A market-neutral spot-perp funding carry on SOL — shorting the SOLUSDT.BINANCE perp (collecting funding) and longing SOLUSDT.BINANCE_SPOT in equal base quantity when 8h funding exceeded +5 bps, holding while funding stayed elevated and closing on normalization or a basis stop — deliberately running the identical BTC-carry implementation as a second-instrument validation to establish funding carry as a class edge rather than an instrument-specific one.

Over ~6 years and 96 trades (48 long-spot / 48 short-perp pairs) the hedge was genuinely delta-neutral (max drawdown ~1.5%, price PnL -$6,262) and funding was credited (+$9,469 gross), but the net result was negative: total return -1.48%, Sharpe -0.06 (CI [-2.28, 2.64]), profit factor 1.03, with funding consumed by $2,756 commission, $3,309 impact, and price drift, plus 88% of funding and 67% of pairs from 2021 alone, zero qualifying trades in 2022/2025/2026, and a SOL-specific capacity wall (impact 50.8% of gross, capacity only $387,677).