UFC Fight Night: Jesus Aguilar vs. Rei Tsuruya (Flyweight, Prelims)

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Market context

Jesus Aguilar is scheduled to face Rei Tsuruya in a flyweight prelim at UFC Fight Night on 30 May, with the market currently sitting at 50% YES on Aguilar. That midpoint implies little separation between the fighters, but the public information does not support a pure coin flip. Comparable fight previews split on style rather than outcome: Tsuruya is generally framed as the fresher grappling and control threat, while Aguilar is seen as the more established submission-capable veteran who can make rounds messy if the fight hits extended clinch and mat exchanges. One recent preview on YouTube backed Tsuruya by decision on takedowns and top control, while sportsbook-style listings have already treated the bout as a live flyweight contest rather than a one-sided spot.

For traders, the main catalysts are official fight-week checks, any late opponent-change risk, and whether weigh-ins confirm both men at flyweight without complications. SofaScore currently lists the bout for 30 May on the UFC prelims, which helps anchor the schedule, but the settlement window runs to 31 May and still leaves room for cancellation, no contest, or a late medical issue. A Paramount+ bout note also describes Aguilar as the grappling-minded side of the matchup, which is broadly consistent with analyst consensus that the winner is likely to be the fighter who dictates where the exchanges take place. The key market watchpoint is whether any sportsbook line moves away from pick’em as official fight week coverage firms up; if it does not, the 50% contract may be near fair value.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.