Yields moved so fast that this became a fire-sale, with prices spiralling downwards.

收益率变化如此之快，以至于这变成了一场大甩卖，价格螺旋式下降。

Hyperinflation is when prices spiral out of control, with an inflation rate typically increasing by more than 50% per month.

恶性通货膨胀是指价格失控，通货膨胀率通常每月增加 50% 以上。

It's quite highly concentrated on people who are younger with bigger loans, who, of course, bought as property prices spiralled higher.

它高度集中在拥有更多贷款的年轻人身上，当然，他们是在房价飙升时购买的。