The prediction market platform Kalshi is offering a promotional bonus for new users participating in the US Open tennis tournament. New customers can receive a $25 bonus by using the promo code NYPMAX when creating an account and completing at least $25 in trades.

The promotion is available for trades on various events, including any US Open match. Currently, Kalshi users are giving Coco Gauff a 94 percent chance to win her opening-round match against Zeynep Sonmez.

Kalshi allows users to trade contracts on outcomes of events such as international soccer matches, college football, and daily baseball games. To qualify for the bonus, users must enter the promo code NYPMAX during sign-up, verify their account information, and execute a minimum of $25 in trades.

The offer is valid for new users only and is subject to Kalshi's terms and conditions. Eligibility requirements, including a minimum age of 18, apply. Event contract trading involves significant risk and may not be suitable for all individuals. Kalshi products are not available in all jurisdictions. Those interested can find more information on regulatory compliance at kalshi.com/regulatory.

The promotion is available in states and territories including Alabama, Alaska, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Minnesota, Mississippi, Missouri, Nebraska, New Hampshire, New Mexico, New York, New Jersey, North Carolina, North Dakota, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Washington D.C., West Virginia, Wisconsin, and Wyoming. However, Kalshi products are not available in Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, Nevada, Ohio, and Washington.