Kalshi Promo Code BOOKIES: $10 Bonus for Duke-Siena, Ohio State-TCU Predictions Mar. 19

By Adam Martin

Mar 19th, 2026 11:07 AM EDT

The NCAA Tournament first round tips off Thursday with 16 games across four national networks, and new Kalshi users can enter promo code BOOKIES during registration to unlock a $10 sign-up bonus. The offer activates after completing $10 in total trades on any available market.

Thursday's schedule runs from 12:15 p.m. ET through late evening, headlined by No. 1 overall seed Duke opening against Siena and a tightly matched Ohio State vs. TCU clash in the 8-9 game. Every matchup is available as an event contract on the Kalshi exchange, where users buy and sell shares priced between $0.01 and $0.99 based on market-driven probabilities.

Claim the Kalshi promo code BOOKIES and get a $10 bonus

Duke vs. Siena - 2:50 p.m. ET (CBS)

Duke enters as the No. 1 overall seed after winning the ACC Tournament behind a roster led by projected top-three NBA draft pick Cam Boozer. The Blue Devils averaged the second-highest scoring margin in Division I this season and have not lost to a team seeded outside the top 50 in KenPom since November.

Siena earned its bid through the MAAC Tournament and faces an enormous talent gap on paper. Historically, No. 16 seeds are 2-140 all-time against No. 1 seeds in the NCAA Tournament, though UMBC's 2018 upset of Virginia and Fairleigh Dickinson's 2023 win over Purdue proved it can happen. Kalshi traders can take positions on both sides of this matchup, and the contract pricing will reflect just how lopsided the market views this game.

For traders using the BOOKIES bonus, the Duke-Siena market is a straightforward entry point. A position on Duke offers a modest return at a high probability, while contrarian traders can find value in Siena contracts trading at a fraction of a dollar.

Ohio State vs. TCU -12:15 p.m. ET (CBS)

This is the day's opening tip and one of the more competitive matchups on the board. The 8-9 line in the NCAA Tournament is historically the closest seed pairing, with No. 9 seeds winning roughly 48% of the time since the field expanded to 64 teams in 1985.

Ohio State and TCU both enter with similar profiles — strong defensive metrics, moderate pace, and conference tournament exits that left questions about momentum. This type of coin-flip game creates active two-way trading on Kalshi, where the price can swing meaningfully on pre-game injury news or lineup decisions.

Nebraska vs. Troy - 12:40 p.m. ET (truTV)

Nebraska punched its ticket to the Round of 64 by beating Richmond in the First Four on Wednesday night. That extra game adds a fatigue variable that Kalshi traders should consider. Troy, meanwhile, has been resting since Sunday's conference championship win and enters with fresh legs and a top-40 three-point shooting percentage.

Fourth-seeded Nebraska is the higher seed, but First Four teams carry a historically mixed record in their follow-up games. The quick turnaround creates a market dynamic where Troy contracts may trade at a slight discount relative to what a neutral four-day rest scenario would suggest.

Billion Dollar Bracket - Final Entry Window

Kalshi's Billion Dollar Bracket contest closes today at 12:15 p.m. ET, just before Ohio State and TCU tip off. Entry is free and requires no deposit or trades. The top-scoring bracket wins a guaranteed $1 million, with the full $1 billion available for a perfect bracket. New users who sign up with promo code BOOKIES can enter the bracket immediately after creating their account.

How To Claim the Kalshi Promo Code BOOKIES

1. Visit Kalshi through this page and tap "Sign Up."
2. Enter promo code BOOKIES in the bonus code field during registration.
3. Complete identity verification with a valid government ID.
4. Deposit a minimum of $1.
5. Trade $10 in total contracts across any market to unlock the $10 bonus.

The bonus applies to cumulative trading volume, it does not need to be a single $10 trade.

Responsible Trading

18+. Event contract trading involves risk and is not appropriate for everyone. Kalshi provides risk management tools including trading breaks, voluntary opt-out, and personalized funding limits. If you or someone you know has a gambling problem, call 1-800-GAMBLER.

About the Author

Adam Martin

More About Adam

Adam Martin is a betting analyst and DFS betting expert for Bookies.com who has covered professional sports, with an emphasis on sports gambling, for more than a decade. He is an authority on UFC betting, while also covering the NBA, NFL, NHL, and MLB.