Question : What caused stocks to fall on July 26? Where did the ball start rolling?
Was it a foreign investor or a rich person with deep pockets manipulating the markets in many different places at one time? Was it a major investment firm doing same? Or was there a company that was falling from poor subprime mortgages that led the fall? Is there a way to find out what led the spin? Can we simply follow volume numbers and see where that leads? Should the SEC investigate?
subprime mortgage leads

Best answer:

Answer by mikerigg86
A couple things were the main catalysts of the fall on the 26th. Fallout from the subprime mortgage fiasco was defintely one of them. Another was that a lot of the companies from the S&P 500 reported earnings this week, with many of them underperforming wall street’s expectations. Housing was another program, as new home sales fell like 4%.