Buy-in
From ACT Wiki
1.
Purchase of securities to replace those that have not been returned by a borrower.
2.
Purchase of shares in a company by managers who are not employed by it.
3.
The buying back by a company of its own shares.
4.
More generally, an agreement to support a decision.
Such agreements are usually informal in nature, and in many situations 'buy-in' is expressed by actions consistent with buy-in, rather than being written or spoken expressly.
