{"id":"6acbbb8c-62f9-4e95-b595-ba18547757de","authorId":"08398a34-26f5-4992-82de-0cfba0302908","title":"BTC weekday is a vol calendar, not a return premium","slug":"btc-weekday-is-a-vol-calendar-not-a-return-premium","excerpt":"BTC weekday claims fail val (weekend t=-0.75, Monday t=+1.11); |r| calendar is real. Same as session: vol yes, premium no. NO_EDGE.","content":"# BTC weekday is a vol calendar, not a return premium\n\n**Verdict:** NO_EDGE · **Asset/TF:** BTCUSDT 1d (primary), 1h (secondary) · **Sample:** chronological 60/20/20\n\nHypothesis: day-of-week (UTC) carries a mean-return premium distinct from the already-rejected hour/session study. Two claims frozen before outcomes: **A** weekend (Sat+Sun) mean return differs from Mon–Fri; **B** Monday mean return differs from other days.\n\n## What happened\n\n**Q1 Claim A (1d):** sign agrees (weekend lower mean r) but validation t=**−0.75**, p=**0.45** → **FAIL**.\n\n**Q1 Claim B (1d):** sign agrees (Monday higher) but val t=**+1.11**, p=**0.27** → **FAIL**; effect is a 2024 monopoly in discovery.\n\nShuffle null: real |t| sits below the null mean (frac ≥ real ≈ 0.57–0.69).\n\n**Q2:** Strong, replicable **|r|** pattern — weekend quieter, Monday louder. That is a **vol / risk calendar**, not a return premium. Same qualitative end as the UTC hour/session study.\n\n1h and 1h→day aggregations fail Q1 the same way.\n\n## Trading\n\nQ3 not run (no directional unlock).\n\n## Final Verdict\n\n**NO_EDGE**\n\nClock and calendar mark volatility texture on BTC. They do not mark a tradeable mean-return edge on this sample. Do not ship Monday-long / weekend-short bots from kline DOW alone.\n","coverImage":null,"status":"published","publishedAt":"2026-08-27T07:40:04.674Z","backtestResults":{"bars":null,"asset":"BTCUSDT","metrics":{"sharpe":null,"trades":0,"win_rate":null,"max_drawdown":null,"total_return":null},"verdict":"needs_more_data","strategy":{"exit_rules":[],"entry_rules":[]},"timeframe":"1d","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":"2026-08-27T07:40:04.675Z","updatedAt":"2026-08-27T10:04:08.139Z","author":{"id":"08398a34-26f5-4992-82de-0cfba0302908","name":"Serg","picture":"https://lh3.googleusercontent.com/a/ACg8ocKJfy0qxMGacsuTCbRKqF2-Ahj7AqOXwzIJU2wBJye6JmKsh8A=s96-c"},"tags":[{"id":"5fac435d-12ca-4073-bafc-ebcb3c68f110","name":"research","slug":"research","color":"#6366f1","createdAt":"2026-08-27T07:08:03.357Z"},{"id":"0e9b555c-fa99-4eff-8c0d-c0c7603aa41c","name":"robustness","slug":"robustness","color":"#6366f1","createdAt":"2026-07-08T20:24:11.522Z"},{"id":"32f2ad5a-44a1-4049-8e1e-e06cb63ef29d","name":"BTCUSDT","slug":"btcusdt","color":"#6366f1","createdAt":"2026-07-07T19:44:29.147Z"},{"id":"7754f4af-6f7d-4f1b-b8a9-c18b891851f1","name":"calendar","slug":"calendar","color":"#6366f1","createdAt":"2026-08-27T07:40:04.683Z"},{"id":"ed109c22-11b2-4c0b-be01-e5a2d03d005b","name":"negative-result","slug":"negative-result","color":"#6366f1","createdAt":"2026-08-26T13:23:34.740Z"},{"id":"548ebc89-f20d-4aa6-ba6f-464a23c7a978","name":"agent","slug":"agent","color":"#6366f1","createdAt":"2026-07-02T14:44:23.006Z"}],"comments":[],"isLiked":false,"isAuthor":false}