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arbitrage

Arbitrage Betting Sports: How it Works on Polymarket

Arbitrage betting sports means buying every outcome across markets so the combined cost is less than $1.00, locking a mathematical edge. On Polymarket that works as intra-market arbitrage: buy complementary outcome tokens (or a complete multi-outcome set) and keep the difference. The spread is mathematical but not without risks — resolution disputes, slippage, fees, and settlement timing can erode profits. PolyArb automates this process on Polymarket, offering low-latency execution and guaranteed minimum edges for subscribers.

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How Polymarket arbitrage actually works

Polymarket markets use the CTF outcome tokens and a CLOB orderbook. For a binary sporting event, YES + NO fair prices sum to $1.00. If bestAsk(YES) + bestAsk(NO) < $1.00, buying both legs mints a complete set that can be redeemed for $1.00 after resolution, leaving the difference as edge. Execution uses the Relayer so users trade gaslessly with pUSD. Multi-outcome sports markets work the same: buy every best ask across outcomes and merge or redeem once resolved.

Practical risks every trader should know

The arithmetic of the spread is straightforward, but several real risks can reduce or eliminate profit: UMA resolution disputes can delay settlement; partial fills and slippage can change realized edge; taker fees (0–1.8% by category) and tick sizes affect execution; and smart-contract or oracle risk, while rare, exists. Never assume a trade is risk-free. PolyArb highlights the $7.62 minimum guaranteed edge per trade in alerts, and still surfaces execution and resolution risks so you can size positions accordingly.

Why speed, alerts, and non-custodial automation matter

Arb spreads are often 2–3% and evaporate in seconds on liquid markets. Latency and reliable alerts determine whether you capture them. PolyArb runs at ~40ms latency versus ~800ms for free bots, with Telegram and Discord alerts and non-custodial order routing so you keep control of funds. The Builder Program and Polymarket APIs power routing and attribution; PolyArb uses those rails to place orders through the CLOB while keeping your wallet non-custodial.

How PolyArb compares to other venues

Kalshi, PredictIt, Manifold and other platforms serve different audiences and regulatory setups. Cross-platform arb is a different discipline — PolyArb focuses on intra-Polymarket arbitrage where the CLOB, CTF, and Relayer create reliable mechanics for complete-set captures. If you’re researching "arbitrage betting sports" specifically, PolyArb is a subscription product ($99/month) built for traders who need low latency, guaranteed minimum edges, and instant alerts on Polymarket markets.

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Subscribe to PolyArb ($99/month) for low-latency, non-custodial automation, Telegram + Discord alerts, and a $7.62 minimum guaranteed edge per trade.

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FAQ

What is arbitrage betting sports on Polymarket?
It’s buying every outcome in a single Polymarket market when the sum of best asks is below $1.00, then holding a complete set that redeems for $1.00 after resolution, capturing the difference as edge.
Is arbitrage betting sports risk-free?
No. While the spread is mathematical, risks include UMA disputes and delayed settlement, slippage and partial fills, taker fees, tick-size constraints, and smart-contract/oracle risk.
How does PolyArb help capture arb opportunities?
PolyArb runs low-latency automation (≈40ms), issues Telegram and Discord alerts, routes orders non-custodially through the CLOB, and guarantees a $7.62 minimum edge per trade for subscribers.

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