Some economists regard the 1929 inventory market crash as main contributing issue to the good melancholy. The speculative increase of the 1920’s triggered the crash due to the construct up of the financial bubble. The bubble was fashioned as a result of within the 1920s, because the inventory costs had been rising, many individuals invested available in the market. As the costs saved rising they continued to speculate hoping the costs would go up perpetually. Most individuals borrowed cash to speculate available in the market.