watchingwashington:

New England Complex Systems Institute is out with a paper claiming to have found exactly what triggered the financial meltdown that led to the Great Recession.  Researchers claim to have found evidence that traders executed a “bear raid” on Citigroup in 2007.  From BoingBoing:

“Bear raids” have been considered a risk to markets since the Great Depression, and a financial regulation called the “uptick rule” was instituted in 1938 to prevent the tactic. The uptick rule was repealed in in July, 2007, and the alleged bear raid took place in November, 2007. (via Complex Systems Institute claims “bear raid” market manipulation crashed the global economy - Boing Boing)