Występowanie wpływowych firm oddziałujących na cały rynek akcji zostało potwierdzone w wielu badaniach bazujących na topologii minimalnych drzew rozpinających. Historycznie, centralne firmy były identyfikowane przede wszystkich na podstawie centralności stopniowej wierzchołków. Niniejszy artykuł przedstawia alternatywną metodę selekcji, stanowiącą połączenie wyników PageRank i klas modularności, która pozwala wyeliminować remisy w rankingach podczas selekcji określonej liczby wierzchołków. Wykorzystano analizę sieciową na podstawie centralności PageRank połączoną z analizą regresji, aby zidentyfikować wpływowe firmy w indeksie Nasdaq-100 podczas trzech ostatnich recesji w Stanach Zjednoczonych. Wykazano zasadność oraz odporność zaproponowanego dwuetapowego podejścia łączącego minimalne drzewa rozpinające z autorską metodą selekcji, które tłumaczy ponad 90% dynamiki indeksu Nasdaq-100. Analiza zidentyfikowała istotne zmiany w topologii podczas globalnego kryzysu finansowego (rola CSCO jako firmy centralnej) oraz pandemii COVID-19 (wspólne ruchy akcji).
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