1. What is the impact of pandemics on price-to-book ratios of banks listed in the stock exchange of the USA within 120 months from the onset of pandemics?

More than a simple regression analysis, one can actually consider mediating variables, employ structural breaks in the model, employ time series models to identify peak impact x-months after the onset of the pandemic, control for the type of bank (commercial, universal, investment, etc.) and country-level factors

a. Can someone help me get started on this question?

b. Where would I find the information on stock exchange prices for the publicly traded banks?