What PM costs and how it may be bought

Smallest buy the venue accepts, in whole PM. FLAT and price-independent: the same number at 5c and at 99c, on either outcome, binding your own order and never doubled through a counterparty's leg. It binds the amount as sent, in whichever sizing mode you sent it. Any amount at or above it is valid, down to PM precision — 12.50 and 17.30 are both legal at a minimum of 10. There is no increment or lot size. It is the only taker sizing rule: the per-market minBuyAmount published on the book snapshot is deprecated and unenforced since the 2026-08-31 beacon upgrade.

PRESENTATION ONLY: the spacing of stake presets an interface may offer. NOT a constraint — a buy need not be a multiple of this, and rounding an amount down to it discards value the venue would have accepted. Validate against minBuyPm instead.