Look-Ahead Bias Reframed as a Verifiable Non-Interference Property for Agentic Trading

arXiv·medium signal

Recasts look-ahead bias — the dominant way a backtest flatters a system that later disappoints — as a temporal non-interference property that can be formally checked, so agentic trading and backtesting pipelines get a verifiable guarantee they don't leak future data into past decisions. It replaces per-construct ad hoc checks with a single checkable property. Useful formalism for anyone building agentic quant or evaluation pipelines.