spec. downside-beta-jp-all-fact-median-sharpecite ledger
qbuntu.ai/cite/downside-beta-jp-all-fact-median-sharpeCC-BY-4.0
Median Sharpe across 320 grid runs is -0.65.
sharpe_ratio-0.65 sharpe_ratiosupports verdict:rejected
Context
Full grid of 320 parameter combinations.
Source strategy
rejectedequity· no_edge
Downside Beta (JP All Stocks)
downside-beta-jp-all
Cite this
qbuntu (2026). Median Sharpe across 320 grid runs is -0.65.. Strategy: Downside Beta (JP All Stocks). https://qbuntu.ai/cite/downside-beta-jp-all-fact-median-sharpe
data source: kabu STATION REST API + J-Quants daily bars
computed asof: 2026-09-26T05:46:57
fact_id: downside-beta-jp-all-fact-median-sharpe (immutable)