How much capital is needed is unclear, given the uncertainty over loan losses.

考虑到贷款损失的不确定性，需要多少资金尚不清楚。

So we can ask speculators on Wall Street to pay small financial transaction tax which would fully fund student loan forgiveness over ten years.

所以，我们可以让华尔街的投机者们支付小额的金融交易税，这样就能满足10年内学生债务减免所需的资金了。