Here’s what could really feed a stock market bubble

This article was originally published on Fool.com. All figures quoted in US dollars unless otherwise stated.

The stock market roared ahead on Tuesday morning, as recent fears from late last week faded completely into the background. As of just before 11.30am EST Tuesday, the Dow Jones Industrial Average (INDEXDJX: .DJI) had soared 587 points to 30,799. The S&P 500 Index (INDEXSP: .INX) had gained 63 points to 3,837, and the Nasdaq Composite (INDEXNASDAQ: .IXIC)  climbed 185 points to 13,588.

Many people within the investment community have looked askance at the short squeeze that has hit GameStop (NYSE: GME) and other stocks recently. GameStop shares fell dramatically Tuesday morning, losing 45% of their value. Many expect…