credit auction econ.

[etoile_russe]

Пожалуйста, помогите перевести.
credit auction, injecting liquidity, withdrawal of liquidity
Выражение встречается в следующем контексте:
The credit auction is quite suitable for injecting liquidity; however it is constrained in withdrawing liquidity to the extent that a withdrawal of liquidity can only be achieved by choosing not to roll over maturing credits.
Заранее спасибо