Causal dynamics among fintech, communication and digital payments firms
摘要
Financial technology (fintech), communication, and digital payments have significantly contributed to the evolution of e-commerce. Inspired by the rapidly growing innovations in e-commerce models induced mainly by fintech and digital payment firms, this study examines the time-varying causality and linkages between fintech stocks (KBW Nasdaq Financial Technology Index) and firms in future payments and future communication businesses (S&P Kensho Future Payments Index and S&P Kensho Future Communication Index) using a battery of three robust estimation techniques with daily data from May 15, 2017, to May 7, 2022. To this end, the rolling window wavelet correlation results demonstrate the existence of positive market correlation at short and medium horizons, mainly between fintech and future payment firms, and a variety of causal relationships, with a notable decrease during the COVID-19 crisis due to the decrease in e-commerce. However, Granger causality between the markets was noticed at different market periods and frequencies. Additionally, the influence of phase synchronization and frequency specificity in the causation between analyzed assets also supports the positive relationship among analyzed assets, implying power predictability among them. These findings have managerial, theoretical, and policy implications, especially in terms of the improved implementation of these new technologies in firms' financial structures.