Volatility of Volume
Stepping away from my normal weekly posts for a minute. I took some time to do a little research and thought I'd share my findings. All the data is sourced from either Refinitiv Eikon or DataStream. I recently saw some posts on Twitter about how much the top five names in the large indices impacted 2021 performance. I didn’t get a chance to look at them in detail. When I started to look into this myself, I found that while the contribution to the performance was rather high compared to an equally weighted portfolio, they weren’t outlandish. The data shows when there was smaller the number of the index constituents, say the NASDAQ 100, the larger the top names overperformed their weights. Below are some screenshots showing the top 5 names by index weight and their performance for the NASDAQ 100, S&P 500, Russell 1000, and the wider Russell 3000. I couldn’t remember where I saw the original chart or what the point being made was, so I sort of gave up. Regardless of what t...