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Arbitrage Calculator 3 Bets: a KALSHIARB Guide

arbitrage calculator 3 bets describes a simple arbitrage setup on a Kalshi binary market: buy YES, buy NO, and lock in the remaining edge when the two best prices sum to less than $1.00. This article explains how the math works, what to watch for in real markets, and how KalshiArb can help you monitor opportunities in real time. You’ll see how small cent spreads add up when combined across a live book and how to guard against slippage and fees. By the end, you’ll understand the practical steps to implement this edge without custody of funds.

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How the arbitrage triangle works in Kalshi binaries

In a typical binary contract, the YES and NO prices on a single market should together total $1.00. When the best YES ask plus the best NO ask is less than $1.00, you can buy both legs and lock in a risk-defined profit. The edge comes from the price gap, not from any single leg alone. KalshiArb monitors live order books to flag these pockets where the sum dips below $1.00 and the combined cost is below the guaranteed payout. Fees reduce the edge, but a disciplined approach can still capture single-digit cent profits per contract. Understanding the mechanics helps you size positions and manage risk across multiple contracts in a single event window.

Combinatorial arbitrage across event children

Some Kalshi events group several mutually exclusive outcomes under one event ticker, producing a family of child markets. If the sum of the best YES prices across all child markets is under $1.00, you can buy a complete set of child YES contracts to lock in the spread. The same logic applies to NO sides. This is a higher-odds, higher-quantity edge that requires careful tracking of all child tickers and their resolution rules. KalshiArb’s scanner can surface these cluster opportunities, helping you execute a bundled trade with a defined payoff when the event resolves.

Endgame yield and risk considerations near settlement

As markets approach resolution, certain binaries can present another edge: buying YES or NO in the late hours when the price is still below $0.99 can yield incremental edge tied to the countdown. This endgame yield is not risk-free—settlement timing, rule disputes, and partial fills can alter outcomes. Always account for the per-contract fee curve and the potential for regulatory or state-limit changes that affect specific categories, especially sports contracts that are under varying state restrictions. KalshiArb provides monitoring and alerting to keep you within the edge window.

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FAQ

What is an arbitrage edge in Kalshi markets?
The edge is the difference between the combined price of YES and NO and the guaranteed $1.00 payout. If YES_ask plus NO_ask is under $1.00, buying both sides locks in a risk-defined profit before fees.
How does KalshiArb help with arbitrage on Kalshi?
KalshiArb acts as a scanner and execution assistant. It surfaces intra-market and combinatorial edge opportunities, and it can execute or alert you to them while you keep custody of your funds and API keys.
Are there fees that eat into arbitrage profits?
Yes. Kalshi charges a per-contract fee that increases toward the middle of the price range. The edge calculations should subtract expected fees to determine net profitability.

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