Credit has been plentiful for those who need to borrow.

市场上信贷充足，足以满足借款者的需求。

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Less plentiful credit means less economic activity.

ECONOMIST: America goes bust

When we consider how many successful businesses have been able to open their doors thanks to the plentiful existence of credit, not to mention how many are reliant on consumers in possession of credit cards, Obama's alleged compassion will ultimately carry an economically hurtful price tag.

FORBES: Political Economy

Moreover, if people want to borrow to buy shares, raising margin requirements would probably send them to the plentiful other sources of credit.

ECONOMIST: Marginal differences