A buyback is a treasury-funded bid for the organization’s own shares. Only the controlling player can authorize it. Evidence
The bid price is floored to a whole Noctmark with a minimum of 1. The requested budget must buy at least one share and treasury must cover it. The system computes floor(budget / bid price) shares, escrows exactly shares × bid price, subtracts that amount from treasury and retained earnings, and places a treasury bid.
When a holder sells into it, the holder receives the escrowed price and the purchased shares become treasury shares. Treasury shares leave the outstanding-share denominator, so the remaining outside holders’ percentages rise even though their counts do not.
Cancelling an unfilled treasury bid returns remaining escrow to treasury and retained earnings. No separate fee, debt block, contract block, or seller compulsion appears in the audited core method: a seller must choose to fill the bid. Compare the ownership effect with Dividends, which distribute cash without changing share counts.