Frequently Asked Questions
Polymarket is the world’s largest prediction market, where you can stay informed and profit from your knowledge by trading on things related to breaking news, politics, sports, elections, crypto, finance, tech, culture, including topics like Citi Open.
Polymarket currently hosts 128 active markets for Citi Open that lets you track or trade on predictions like “Mamdani opens city-owned grocery store by June 30?”. Whether you are tracking widely debated events or niche outcomes, the platform aggregates real-time odds based on over $2.1M in trading volume, providing a comprehensive view of fan and investor sentiment.
Each polymarket is a yes/no question, like “Mamdani opens city-owned grocery store by June 30?”. You buy shares in “yes” or “no” outcomes. Prices reflect crowd-sourced odds and probabilities. For example, if yes is at 30 cents, that’s a 30% chance. Markets resolve based on official results. For multi-outcome events, like “2026 Men’s US Open Winner (Tennis),” you simply trade on the specific outcome you think will win.
As of today, the most active market is “2026 Men’s US Open Winner (Tennis),” where the crowd is currently assigning a 39% chance to Jannik Sinner. These odds update in real-time as new information emerges and users trade, offering a dynamic snapshot of what the market believes will happen compared to traditional bookmaker odds.
It cuts through the noise. Unlike polls or punditry, Polymarket shows you real-time odds on Citi Open predictions backed by financial conviction that are often faster and more accurate than experts or surveys. You get an unbiased view of what thousands of traders think will actually happen, often more accurate than polls. Plus, you can trade shares and potentially profit if your predictions are spot on.