What EventArb Is
EventArb is a third-party tool that scans for arbitrage opportunities across event-contract markets, with Kalshi listed among the platforms it covers. Its core function is identifying price discrepancies between related markets — situations where the same underlying outcome may be priced differently across venues, potentially allowing a trader to lock in a risk-reduced position by trading both sides.
Beyond that high-level description, public details about EventArb are limited. The tool's website is available at eventarb.com, but detailed documentation about supported markets, update frequency, or methodology has not been independently reviewed here. Prospective users should consult the site directly for current information.
Where It Fits in the Kalshi Ecosystem
Kalshi is a CFTC-regulated prediction market exchange where participants trade event contracts — binary or scalar contracts that settle based on real-world outcomes. Because Kalshi operates in USD and is regulated as a designated contract market, it occupies a distinct position in the event-contract landscape.
Arbitrage tools like EventArb sit at the periphery of this ecosystem as third-party utilities. They do not execute trades directly on behalf of users (though public details on EventArb's exact capabilities are limited), but instead surface informational signals — price gaps or mismatches — that traders can act on manually or through their own systems. For a platform like Kalshi, where markets cover topics such as economics, politics, and weather, cross-market arbitrage scanning can be relevant when comparable contracts exist on other platforms simultaneously.
Who It's For
EventArb appears to be aimed at traders who are already active on event-contract markets and are interested in cross-market inefficiencies. This typically includes:
- Quantitatively oriented traders comfortable evaluating whether an apparent price gap represents a genuine opportunity or reflects legitimate differences in contract terms, settlement rules, or counterparty risk.
- Active market participants who monitor multiple prediction market platforms and want a consolidated view of pricing discrepancies.
- Researchers and analysts who study event-contract pricing across venues.
It is less likely to be useful for casual or infrequent traders who are focused on a single market or a single event type.
Typical Use Cases
Based on the tool's description, the primary use case is scanning for mispricings between event-contract markets. In practice, this might mean identifying a situation where a contract on a given political or economic outcome is priced at one probability on Kalshi and a meaningfully different probability on another venue covering the same event.
Because public documentation is limited, it is not possible to confirm specifics such as how many markets are scanned, how frequently data is refreshed, whether alerts or notifications are supported, or whether the tool provides any execution assistance.
Things to Weigh When Choosing an Arbitrage Scanning Tool
Anyone evaluating EventArb — or any tool in this category — should consider a few general factors:
- Contract comparability: Apparent arbitrage in event markets often dissolves on closer inspection because two contracts may differ in expiry, resolution source, or exact outcome definition. A good scanner should make these differences visible, not obscure them.
- Latency and data freshness: Arbitrage windows in liquid markets can be brief. Understanding how current the data is matters.
- Transparency of methodology: How the tool identifies and ranks opportunities affects how much weight you can give its signals.
- Regulatory context: Kalshi is CFTC-regulated; other platforms may operate under different or no regulatory frameworks. Trading across venues carries its own compliance and operational considerations.
- Cost and access model: Pricing and subscription terms for EventArb are not detailed in available public information; users should verify these on the website.
Bottom Line
EventArb is a cross-market arbitrage scanner that includes Kalshi among its covered event-contract platforms. It is positioned for traders who actively monitor multiple prediction market venues and want automated help surfacing potential price discrepancies. Because detailed public documentation is limited, the best next step for anyone seriously considering the tool is to visit eventarb.com to evaluate current features, coverage, and pricing firsthand before making a decision.