Dizzy and giddying is different .

头晕与眩晕是不同的。

But a month later investors ' confidence took a giddying turn as the weakening american housing market jeopardized the banks ' capital .

但一个月之后又发现美国房地产市场的恶化已经威胁到了银行资本，于是投资者对市场一下子失去了信心。