At AVA Investment Analytics, we cover a very large number of securities; many more securities than the 65 or so that we provide trading guidance for in our newsletters. The key to our success is knowing several companies well enough to know when to buy and well to sell.
We also determine the probability of each security to hit/miss/beat earnings estimates.
Finally, we utilize our stock market forecast to determine a scenario analysis for each security in order to generate a relative risk profile.
Despite the fact that we are very limited in our abilities to provide subscribers to our newsletters with frequent trading opportunities, we have managed to blow away the indices each year (a precise determination of the outperformance level is impossible because we provide a scenario analysis for each security in these publications, so each investor will have different results. And we lack the man power to determine the results for each scenario for each security each month).