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The $1 Billion Kalshi Perfect Bracket Challenge $1 Billion for a perfect bracket $1 Million guaranteed to the top scoring bracket $1 Million to charity and scholarships See the full rules and submit your bracket: t.co/oIRws6H3Jn No purchase or deposit required. SIG Parametrics, LLC, a member of the Susquehanna International Group of Companies, is financially backing this promotion.