Polymarket Introduces Dynamic Fees to Curb Latency Arbitrage in Short-Term Crypto Markets

Prediction market platform Polymarket has introduced a dynamic taker-fee model for its 15-minute crypto markets. This change aims to neutralise latency-based arbitrage strategies that had emerged under the platform’s previous zero-fee structure.

The update applies only to takers executing against existing liquidity on these short-term markets. Most other Polymarket markets remain fee-free, including deposits, withdrawals, and trading in longer-dated contracts.

How the Arbitrage Worked

Under the earlier model, the lack of fees on 15-minute crypto markets created a narrow but repeatable opportunity for automated strategies. Bots monitored small delays between Polymarket’s internal pricing and spot prices on major crypto exchanges. They entered trades when odds hovered near 50/50 and exiting moments later once prices converged.

On-chain data suggest that at least one wallet executed thousands of such trades in a single month with an extremely high success rate, capturing small but consistent gains without taking meaningful directional risk.

You will 𝗡𝗘𝗩𝗘𝗥 find better 𝗪𝗜𝗡 𝗥𝗔𝗧𝗘 on Polymarket!

This user isn’t a trader.

It’s a bot that turned $313 into $414k in one month.

𝗛𝗶𝘀 𝘀𝗲𝗰𝗿𝗲𝘁?
He's running one simple strategy.

No narratives.
No adjustments.
Same loop thousands of times.

𝗪𝗵𝗮𝘁 𝗶𝘁… pic.twitter.com/zJoh7uzYfj

— Dexter's Lab (@DextersSolab) January 5, 2026

Fee Design as a Market-Structure Tool

With the new framework, Polymarket has enabled dynamic taker fees on 15-minute crypto markets specifically to fund its Maker Rebates Program. The fees are redistributed daily to liquidity providers, incentivising deeper order books and tighter spreads.

Crucially, the taker fee is highest when odds are closest to 50% – precisely where latency-driven strategies were most active. At that level, fees can reach approximately 3.15% on a 50-cent contract, exceeding the typical arbitrage margin and making the strategy unprofitable at scale.

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A Step Toward Market Maturity

The change reflects a broader shift in Polymarket’s market design. While latency-sensitive traders generated trading volume, they profited from infrastructure lag rather than genuine forecasting or liquidity provision.

By redirecting incentives through targeted fees and rebates, the platform is prioritising market quality over raw volume. Trading venues often have to make similar trade-offs, moving from early-stage growth toward longer-term sustainability.

The update signals a continued maturation of Polymarket’s infrastructure, closing early inefficiencies without abandoning fee-free access across the broader platform.