The Dow Jones Industrial Average has fallen more than 600 points, just one day after the market was hit with its worst day since February.
The Wednesday drop of nearly 832 points was the third-worst point decline in history.
Technology shares were among the hardest hit, with Netflix, Amazon, and Google parent Alphabet leading the way.
Former congressman Ron Paul told Eyes On Events that a major crash is just a matter of time, stating that the US is approaching the "biggest bubble in the history of mankind."
However, the technology sector began bouncing back on Thursday, despite the more than 500 point drop, gaining 0.46 percent.
The communication services sector also rose 0.49 percent on Thursday, with Facebook and Alphabet both rising 1.4 percent.