Concerns about a new speculative bubble fall into three categories.

对于一个新的投机泡沫的担忧可分为三种。

The speculative bubble was based on a bet that served as its own foundation.

投机的泡沫建立在赌局之上，以此作为其自身的基础。

It's also good news if prices fall due to the collapse of a speculative bubble.

即使价格下降是由于投机泡沫的破灭造成的，也仍然是个好消息。

Some analysts believe that investors have inflated a speculative bubble in commodities.

一些分析家相信投机者夸大了农产品和矿产品的投机泡沫。

Yet Wall Street continues to struggle through the aftereffects of the biggest speculative bubble in history.

然而，华尔街依然在艰难地应对这场有史以来最大的投机性泡沫造成的负面后果。