Are Financial Crashes Predictable?
  We critically review recent claims that financial crashes can be predicted using the idea of log-periodic oscillations or by other methods inspired by the physics of critical phenomena. In particular, the October 1997 `correction' does not appear to be the accumulation point of a geometric series of local minima. 
Laurent Laloux (1), Marc Potters (1), Rama Cont (1,2), Jean-Pierre   Aguilar (1,3) and Jean-Philippe Bouchaud (1,4) ((1) Sci...