Finding arbitrage opportunities in Gold through Polymarket

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(this seems way too good to be true - needs more research) 

We have identified two separate, mispriced markets for the same event (the closing price of gold on Dec 31, 2025).

  • Market A: "Will gold close above $4,000?"

    • "Yes" shares are priced at $0.67.

  • Market B: "Will gold close below $4,000?"

    • "Yes" shares are priced at $0.39.

These two outcomes are mutually exclusive. It is impossible for both to be "Yes." The total price for a complete set of outcomes should be $1.00.

The current combined price is $0.67 + $0.39 = $1.06. This $0.06 gap is a guaranteed, risk-free profit.

The Trade 

The strategy is to sell the overpriced set of outcomes. For every 1 share of "A", we sell 1 share of "B".

  1. SELL 1 Share of "Gold > $4000" (Yes)

    • Credit: +$0.67

  2. SELL 1 Share of "Gold < $4000" (Yes)

    • Credit: +$0.39

Result: We immediately receive $1.06 in cash per set of shares sold.


3. Guaranteed Profit Scenarios

We have collected $1.06. Our maximum possible payout is $1.00. This guarantees a profit in every possible scenario.

  • Scenario 1: Gold closes ABOVE $4,000

    • We pay $1.00 on our "Gold > $4000" sale.

    • We pay $0.00 on our "Gold < $4000" sale.

    • Profit: $1.06 (Credit) - $1.00 (Payout) = $0.06

  • Scenario 2: Gold closes BELOW $4,000

    • We pay $0.00 on our "Gold > $4000" sale.

    • We pay $1.00 on our "Gold < $4000" sale.

    • Profit: $1.06 (Credit) - $1.00 (Payout) = $0.06


4. Summary & Risks

The Bottom Line: This is a pure mathematical arbitrage that locks in a minimum 6.0% return on our $1.00 of collateral (the payout)

The primary risks are not in the trade's logic but in its execution:

  • Fees: Transaction/gas fees must be lower than the $0.06 profit.

  • Liquidity (Slippage): We must be able to sell both shares at a combined price above $1.00.

  • Platform Risk: We are exposed to Polymarket's counterparty risk until the contract settles at the end of 2025.


Links: 

https://polymarket.com/event/what-price-will-gold-close-at-in-2025-higher-strikes

https://polymarket.com/event/what-price-will-gold-close-at-in-2025-4000-5000 


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