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NO-Side Price Reversion on Climatic Extremes

Statisticalscore 5found Aug 7, 2026

Fades the overreaction of markets to short-term forecast spikes by buying NO contracts when extreme weather predictions are likely to be revised down.


This strategy focuses on Polymarket's daily temperature or precipitation lines, which often exhibit sharp price moves toward YES when a single forecast run predicts an extreme (e.g., 100°F). The bot detects these spikes by comparing the last 10 forecast iterations; if the extreme appears in fewer than 3 runs and the consensus remains moderate, it buys NO contracts at inflated NO prices (since YES is overbought). Entry is triggered when the NO price drops below 40% while the statistical probability of the event (based on ensemble models) is above 55%. Exit is typically after 3-6 hours as forecast runs converge or when the market rebalances to within 10% of the model's probability. Results from the report's 5 monitored wallets show a cumulative 4.2% edge per trade, though with occasional losses when a cold front unexpectedly holds. Implementation involves scraping forecast ensembles from ECMWF and GFS, running a rolling variance filter, and placing market orders on the NO side during high-volume windows. The bot uses a minimum size of $50 per trade to overcome fees.