Consider the mysterious sell-off in the equity markets on February 27, 2007.
This was the entry point on the short side for some well-informed market participants.
The next warning was major quant funds blowing up in September-October 2007. Historic relationships between markets started to break down then.
S&P 500 topped out on October 31, 2007.
Rep. Paul Kanjorski: America's economy was attacked 'by somebody' on September 11, 2008