![]() CATEGORIES: BiologyChemistryConstructionCultureEcologyEconomyElectronicsFinanceGeographyHistoryInformaticsLawMathematicsMechanicsMedicineOtherPedagogyPhilosophyPhysicsPolicyPsychologySociologySportTourism |
Influence on Competitors – RegressionBut our main question is whether significant news affects the competitors. In the previous regressions we had all the data, but now only significant news are analysed. Approximately 10% of the largest returns (both positive and negative) were chosen as “important” news (the number is equal to the number of outliers in the first tests). I regressed competitors’ returns on company A’s significant returns and controlled for the industry using S&P technology index.
- - - - Proportion of the news’ effect on competitor(s)’ return H0: company A’s significant return does not negatively affect its competitors’ returns on the same day. Ha: company A’s significant return negatively affects its competitors’ returns on the same day.
This time the only significant results are shown by Apple. It has a dramatic opposite effect on its competitors. The results are also highly significant. NCR and Microsoft also show some opposite effect, but the results are insignificant and are very close to 0. Discussion of the Results Date: 2015-12-17; view: 685
|