A CROSS-ASSET, LONG+SHORT risk-regime allocator on US index ETFs — a completely different family from the collision list, which is entirely crypto delta-neutral spot-perp FUNDING CARRY (all abandoned fee_edge/other). No funding, no perps, no crypto, no two-leg basis convergence. The mechanism is flight-to-quality regime switching between US equities and long-duration Treasuries, an archetype the factory explicitly flags as 'the most robustly backtestable strategies in the whole factory' because USEQ daily bars carry DECADES of split-adjusted history — exactly the deep sample the 3-phase deflation (PBO, DSR, programme FDR) needs and that the single-name crypto TSMOM/funding clones never had. Regime is read off the S&P 500 proxy: RISK-ON when SPY closes above its long SMA AND SPY trailing realized vol sits below a high threshold; RISK-OFF otherwise. Risk-on: hold LONG QQQ (equity beta). Risk-off: exit QQQ, rotate LONG TLT (Treasuries rally on the classic flight-to-quality bid when equities de-risk) AND put on a modest SHORT QQQ — so the book carries genuine short exposure, directly attacking the 85.3% long-only concentration rather than adding to it. The edge is a persistent negative equity/bond correlation in stress plus equity trend persistence, not a fitted spread or a scheduled cash flow. Kept to TWO tunables (sma_len, vol_lookback) plus fixed threshold multipliers to resist the overfit deaths that killed the multi-parameter crypto clones.