Friday, March 26, 2004

Didier Sornette



Reading D. Sornette's "Critical Market Crashes" In Physics Reports volume 378, pages 1-98, (2003).

It seems to be a condensed version of Sornette 's recent book.

It's interesting to read the part about using the Ising model to approximate how the market reaches a crash point (especially since I was looking at the Landau theory of 2nd order phase transition). The long-range correlation well-known at the points of phase transition is exactly what happens at a market crash: a sufficient number of traders simultaneously decide to sell, inspite of their not talking to each other directly.