{"fact_id":"liquidity-premium-us-sp500-fact-median-sharpe","strategy_slug":"liquidity-premium-us-sp500","claim":"Median Sharpe across 320 grid runs is 0.27.","value":0.27,"value_text":null,"unit":"sharpe_ratio","context":"Full grid of 320 parameter combinations.","supports_verdict":"marginal","source_run_id":null,"search_tsv":"'0.27':8 '320':4,12 'across':3 'combin':14 'full':9 'grid':5,10 'median':1 'paramet':13 'run':6 'sharp':2","cite_url":"https://qbuntu.ai/cite/liquidity-premium-us-sp500-fact-median-sharpe","strategy":{"slug":"liquidity-premium-us-sp500","name":"Liquidity Premium / Amihud Illiquidity (US S&P 500)","verdict":"marginal","url":"https://qbuntu.ai/strategies/liquidity-premium-us-sp500"},"provenance":{"tier":"shallow","git_sha_z":"1455e77","data_source":"kabu STATION REST API + J-Quants daily bars","source_repo":"C:\\Users\\mirac\\projects\\qbuntu\\analysis","source_files":["scripts/grid_search/liquidity_premium_grid.py","src/risk/regime.py"],"computed_asof":"2026-09-24T02:22:20","numpy_version":"2.4.2","pandas_version":"3.0.0","python_version":"3.12.10","source_project":"qbuntu-analysis","git_sha_genkidama":"17a7674"},"license":"CC-BY-4.0"}