This API calculates abnormal returns and test statistics following the scientific method ‘event study methodology’
Calling this API will perform a return event study for a certain date, stock, and reference market. You can further specify all parameters of the event and estimation windows and select test statistics.
Return event studies quantify the impacts events have on the returns of stocks by calculating the differences between the realized returns and the returns that would have occurred if the event had not taken place (normal returns). This difference is named an abnormal return and presents one key output variable of this API.