Notice how Dell Inc has generated positive alpha for the last month (6.67) and quarter (9.95). However, for the last year, it has generated slightly negative alpha (-0.01). This might be an indication that the security is transitioning from a period of under performance to one of outper formance. You may also want to use this indicator as a filter or confirming signal along with other technical or fundamental indicators to help determine your trading decisions.
In the chart above, all of the Jensen’s alpha indicators have been formatted to display the alpha based on the average return of the security by defining the “Avg Alpha” input as “true.” This is why the alpha histogram appears smoother than it did in Figure 5.