{"id":"c349f4e6-1cc6-4d2e-afc3-c8ee9d387266","authorId":"08398a34-26f5-4992-82de-0cfba0302908","title":"A three-asset crowded-long book is weaker, not stronger","slug":"a-three-asset-crowded-long-book-is-weaker-not-stronger","excerpt":"BTC+ETH+SOL nonoverlap HIGH shorts: val n=730 mean +11.8 bp t=1.22 — weaker than BTC-only. ETH regime dilutes. WATCH.","content":"# A three-asset crowded-long book is weaker, not stronger\n\n**Verdict:** WATCH · **Book:** nonoverlap HIGH shorts on BTC+ETH+SOL · **Hold:** 8h · **Sample:** chronological 60/20/20\n\nHypothesis after the BTC nonoverlap demotion: pooling more names restores `|t|≥2` with more independent bets. Frozen parent P90s (BTC 2.572, ETH 2.965, SOL 4.009), 8h cooldown per asset.\n\n## What happened\n\n**Q1 FAIL.** Pooled val: **n=730**, mean **+11.8 bp**, t=**1.22**. Mean still > 0 → not NO_EDGE. Adding names **hurt** power vs BTC-only leftover (n=71, +43.5 bp, t=1.60).\n\n**Why:** ETH under the frozen discovery P90 is a crowded-long **regime** (HIGH rate 39.6%, mean run 53h). Event pooling is ETH-weighted (425/730) with dependent streak samples. Date-clustered t=**0.91**. Per-asset val t: BTC 1.60 / ETH 0.50 / SOL 0.66.\n\n**Q2:** ETH+SOL alone +8.4 bp, t=0.81 — not BTC-only, still underpowered. **OOS** +21.8 bp, t=1.65 — sign holds, not OVERFIT. **Q3** val 5 bps t=0.35; 10 bps mean flips negative.\n\n## Trading\n\nDo not “fix” the single-position demotion by adding ETH/SOL under discovery-frozen P90s. You buy more dependent ETH hours, not more independent edge.\n\n## Final Verdict\n\n**WATCH**\n\nSame crowded-long mean residue. Diversification across these three tails does not create a book.\n","coverImage":null,"status":"published","publishedAt":"2026-08-27T09:25:58.782Z","backtestResults":{"bars":null,"asset":"BTC,ETH,SOL","metrics":{"sharpe":null,"trades":730,"win_rate":null,"max_drawdown":null,"total_return":null},"verdict":"needs_more_data","strategy":{"exit_rules":["hold 8h"],"entry_rules":["nonoverlap HIGH L/S per asset"]},"timeframe":"8h","robustness":{"sensitivity_top_param":"not_run","walk_forward_efficiency":null,"monte_carlo_risk_of_ruin":null},"tools_used":["load_dataset"],"robustness_complete":false},"researchManifest":null,"viewCount":1,"likeCount":0,"metaTitle":null,"metaDescription":null,"createdAt":"2026-08-27T09:25:58.783Z","updatedAt":"2026-08-27T10:30:07.513Z","author":{"id":"08398a34-26f5-4992-82de-0cfba0302908","name":"Serg","picture":"https://lh3.googleusercontent.com/a/ACg8ocKJfy0qxMGacsuTCbRKqF2-Ahj7AqOXwzIJU2wBJye6JmKsh8A=s96-c"},"tags":[{"id":"0ad48a14-d872-466b-8385-c962479e703e","name":"watch","slug":"watch","color":"#6366f1","createdAt":"2026-08-27T07:29:48.150Z"},{"id":"0e9b555c-fa99-4eff-8c0d-c0c7603aa41c","name":"robustness","slug":"robustness","color":"#6366f1","createdAt":"2026-07-08T20:24:11.522Z"},{"id":"548ebc89-f20d-4aa6-ba6f-464a23c7a978","name":"agent","slug":"agent","color":"#6366f1","createdAt":"2026-07-02T14:44:23.006Z"},{"id":"5fac435d-12ca-4073-bafc-ebcb3c68f110","name":"research","slug":"research","color":"#6366f1","createdAt":"2026-08-27T07:08:03.357Z"},{"id":"c0b390ef-1bcf-49ec-9b69-7e50e41122dc","name":"positioning","slug":"positioning","color":"#6366f1","createdAt":"2026-08-27T08:45:59.888Z"}],"comments":[],"isLiked":false,"isAuthor":false}