Ticketing files hinge on one scenario: the event doesn't happen, and every card comes back at once. Brokers and venues that can show inventory sources, clear refund terms, and a cancellation waterfall get placed — because the bank can price the worst night on the calendar instead of imagining it.
Venues and promoters with owned inventory run ~3.2–4%. Secondary-market brokers price higher and need clean sourcing docs.
Inventory source (primary allocation vs resale), refund policy on postponement vs cancellation, and your delivery method + timing.
Underwriters model "headliner cancels, 4,000 refunds in 72 hours." Answer it in writing before they ask and you're ahead of 90% of files.