Using the standard bispectrum rebranded as an extended Fourier transform, the paper claims Infosys stock prices show phase-coupled frequency modes while nine other NSE stocks and the Nifty 50 index do not.
The efficient market hypothesis and insider trading on the stock market.Journal of Political Economy, 98(1):70–93, 1990
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Identification of phase correlations in Financial Stock Market Turbulence
Using the standard bispectrum rebranded as an extended Fourier transform, the paper claims Infosys stock prices show phase-coupled frequency modes while nine other NSE stocks and the Nifty 50 index do not.