This research classifies financial events, i.e., the collapse of Lehman Brothers (2008) and flash crash (2010), their effects on two different stocks corresponding to Citigroup Inc. (2009) Iamgold Corporation (2011) verify if market data these years were affected more by crashes 2008 or 2010. Applying four techniques, dynamic Fourier methodology, wavelet analysis, discriminant clustering empiri...
