2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/208348We investigate the local fractal properties of the financial time series based on the evolution of the Warsaw Stock Exchange Index (WIG) connected with the largest developing financial market in Europe. Calculating the local Hurst exponent for the WIG time series we find an interesting dependence between the behavior of the local fractal properties of the WIG time series and the crashes appearance on the financial market.LaTeX, 14 pages, 12 figures includedStatistical FinanceComputational Engineering, Finance, and ScienceData Analysis, Statistics and Probabilitytext