Economic activity around the world should be supported by analysis determined by the different level of difficulty of applied quantitative methods. The article presents the importance selecting a proper time window for analysis for correct diagnosing of situations based on information taken from TNI, BSOPM, Markowitz’s, and Sharpe’s models. TNI shows the role of expansiveness of media relations regarding the SE. The correct specification of the time window causes the proper valuation of price and risk. Behavioural finance flaming effect is a field of discussion in his research.
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