SP500: A Constantly Enhanced Moving Target
The SP500 is the most followed benchmark for equity investors. In today’s report we take a step back from the recent market turbulence and focus on one of the biggest challenges of beating the SP500 – additions / deletions to the index. For context, over the last 20 years, on average about 5.5% of SP500 companies are added and deleted each year. We decomposed the substantial differences between stocks that are added and dropped from the index to understand the impact. Further, to capture some of the performance of the additions and avoid that of the deletions, we created two proprietary “potential add and potential drop” baskets to the SP500 to create alpha from names just below the top 500 in market cap.