If the central bank wants to establish, say, PMin as implied by point A'', which exceeds P0, it creates a supply surplus of bonds (namely B** — B*), which has to be taken up by the central bank.

比如说，如果央行想确立如图中点A ''所对应的债券最低价格PMin，这个最低价格高于市场均衡价格P0，它造成债券供应过剩（即 B** — B*），这些过剩的债券供应将由央行收购。

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