Mar. 6, 2015
It's been exactly six years since the the S&P 500 hit an intraday low of 666.79 on March 6, 2009.
The S&P 500 opened on Friday at 2,100.91, a remarkable 215% gain. It's just off its all-time high of 2,119.59 (Feb. 25).
"Only three [bull markets] since World War II have lasted this long,"
http://www.businessinsider.com/bull-market-6th-birthday-2015-3 Mar. 11, 2015
Societe Generale analyst Andrew Lapthorne illustrates it by charting the rolling six-year return in the S&P 500 since 1907.
"Such a strong six year run up in US equities has only been seen twice since 1900, i.e., back in 1929 and 1999, neither of which ended well," Lapthorne wrote.
http://www.businessinsider.com/rolling-six-year-return-sp-500-2015-3