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Polymarket Dump & Hedge Bot: Complete Production-Grade Binary Hedging Arbitrage Strategy

One of the most reliable, low-risk strategies on Polymarket’s high-volume 15-minute crypto UP/DOWN markets is the Dump & Hedge (also called Binary Hedging Arbitrage). It exploits emotional overreactions and temporary price dislocations to lock in guaranteed profit at resolution — no directional prediction required.

This is a battle-tested, production-ready Polymarket trading bot implementation used by multiple quant teams.

Core Strategy Principle

In every 15-minute round:

  • Exactly one outcome (UP or DOWN) settles at $1.00
  • The other at $0.00

Therefore, any time you can buy one share of UP + one share of DOWN for less than $1.00 total, you have locked in risk-free (or near risk-free) profit.

The bot capitalizes on sharp dumps caused by panic selling in the first few minutes of each round.

Full Trade Flow (Dump + Hedge)

  1. Market Discovery — Auto-detect active 15m UP/DOWN contracts for BTC, ETH, SOL, etc. via Gamma API.
  2. Real-time Monitoring — Poll CLOB order books for bid/ask and time remaining.
  3. Dump Detection — Trigger when one side drops sharply (e.g. >15% in <10–30 seconds).
  4. Leg 1 (Dump Buy) — Immediately buy the dumped side at current ask.
  5. Leg 2 (Hedge) — Wait until combined cost (Leg 1 avg price + opposite ask) ≤ target (typically 0.93–0.96), then buy the opposite side.
  6. Auto Management — Handle single-leg risk with stop-loss, early take-profit, or last-minute close.
  7. Resolution Auto-Redeem — Automatically redeem winning shares post-settlement.

Key Parameters (Configurable)

  • DUMP_HEDGE_SHARES: Shares per leg (e.g. 50–500)
  • DUMP_HEDGE_SUM_TARGET: e.g. 0.94 → +6% locked
  • MOVE_THRESHOLD: 0.15 (15% drop)
  • TRADING_WINDOW_MIN: First 8–10 minutes only
  • STOP_LOSS_PERCENTAGE & MAX_WAIT_MIN: Risk control on orphaned legs

Pseudocode – Core Engine 

async function onPriceUpdate(upAsk: number, downAsk: number, timeLeft: number) {
  const dumpedSide = detectDump(upAsk, downAsk); // returns "UP" or "DOWN"

  if (dumpedSide && !hasPosition) {
    // Execute Leg 1
    await buyDumpedLeg(dumpedSide, SHARES);
  }

  if (hasLeg1 && getPairCost() <= SUM_TARGET) {
    // Execute Leg 2 - lock profit
    await buyHedgeLeg(oppositeSide, SHARES);
    log(`Locked ${ (1 - pairCost) * 100 }% profit`);
  }
}
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Risk Controls & Production Features

  • Single-leg exposure timeout + stop-loss
  • Order book depth validation before execution
  • Simulation mode for safe backtesting
  • Telegram / dashboard alerts
  • Auto position tracking across multiple assets
  • Graceful handling of CLOB latency and partial fills

Why This Works Exceptionally Well on Polymarket

  • High volatility in first minutes of each round creates frequent dislocations.
  • Retail FOMO/panic provides consistent edge.
  • Structural guarantee at resolution (binary payoff).
  • Scalable across dozens of parallel 15m markets.

Backtested and live results show consistent positive expectancy with low drawdowns when parameters are tuned conservatively.

This Dump & Hedge Bot serves as an excellent foundational layer for more advanced Polymarket systems — you can later layer statistical edges, inventory skew, or cross-market logic on top of the core hedging engine.

Original Document: Polymarket Hedge Bot (Scribd)

If you have more questions, please feel free to contact me at any time: https://t.me/FatherSon97

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