A delta-neutral cross-venue funding-spread arbitrage that captures structural differences between Binance and Hyperliquid perpetual funding rates on BTC. When Binance 8h funding exceeds Hyperliquid 8h funding by ≥ 0.025% (annualized ~27%), simultaneously go LONG BTCUSDT on Hyperliquid (receive higher funding from the longs that are crowded on the cheaper venue) and SHORT BTCUSDT on Binance (collect the elevated funding the Binance longs are paying). The two perp legs cancel net delta to <1%, so the trade is directionally hedged — P&L comes purely from the funding-rate differential plus minor basis-convergence dynamics. This fills FIVE under-represented portfolio buckets simultaneously: cross-venue (1.4% → boosts toward 15% target), Hyperliquid (7.5% → toward 20%), long-short direction (13.5% → toward 45%), non-Binance dominance (Binance is 86.1% — this trade reduces single-venue concentration), and mid-term-horizon market-neutral. Critically the mechanism is FUNDAMENTALLY different from every failure this session: it does NOT rely on OHLCV pattern recognition, it does NOT depend on BTC's 2024-2026 microstructure regime (which has decayed every directional BTC strategy), and it has only TWO core parameters (entry-spread threshold, exit-spread threshold) which makes walk-forward overfitting structurally impossible. Position sizing: 25% of equity per leg (50% total margin utilization across both exchanges). Risk per trade: ~1.5% of equity in worst-case basis-divergence + funding-flip scenario.