Mothballing a Strategy and Bringing It Back
The process of pausing a live strategy without fully decommissioning it — keeping its research, code, and rationale intact so it can be safely restarted later if conditions change.
A strategy that's stopped performing doesn't have to be either kept running at a loss or deleted entirely — mothballing is the middle option: turn off live trading, flatten positions, but preserve everything needed to restart it later without redoing the original research. This matters because plenty of strategies stop working for reasons that are cyclical rather than fatal — a mean-reversion strategy can go quiet for years during a strong trending regime and come back to life once volatility and range-bound conditions return.
A proper mothballing checklist keeps: the exact code and parameter set that was live, the research notes explaining why it worked and under what regime, the historical performance record including why it was turned off, and a clear statement of what conditions would justify reconsidering it. Without this, a mothballed strategy quietly becomes an orphaned strategy — nobody remembers why it was stopped, the code rots against an updated data pipeline, and restarting it later means re-deriving everything from scratch, at which point it may as well be a brand new strategy proposal.
Restarting isn't automatic either: a mothballed strategy should go back through a lightweight version of the original review, checking that the market conditions that triggered the pause have genuinely reversed and that nothing in the broker, data, or regulatory environment has changed since it last traded live.
Mothballing preserves a paused strategy's code, rationale, and stop conditions so it can be evaluated for restart later, rather than deleting it outright or leaving it running unprofitably — the risk to guard against is letting a mothballed strategy silently rot into something nobody remembers well enough to safely bring back.
Further reading
- Standard desk practice for strategy lifecycle management