Louis Foy
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Markets

Trading strategies, backtested on real data, with the code and the caveats.

Nothing in this section is investment advice. Backtests are hypothetical and past performance is not a reliable guide to future results. See the disclaimer.

Commodities
Cut the duds, keep the runners

A breakout strategy for commodity shares made money in each of the past five years, largely by admitting its mistakes the next morning

Sep 30, 2026 · 6 min
Insider trading
When the bosses buy

Clusters of insiders buying their own company’s shares have been followed by three-day gains since 2021. Fresh data will show whether the edge survives

Sep 30, 2026 · 6 min
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