5 ms·
Regarding unprecedented concentration, wasn't the nifty fifty era comparable for the top 10, about 40%?
by kipchak 2mo ago
Regarding unprecedented concentration, wasn't the nifty fifty era comparable for the top 10, about 40%?
- riffraff 2mo agoI frankly don't know, the "unprecedented" is something I read in articles but haven't actually investigated.
- kipchak 2mo agoLooking at for example 1965, the top 10 of the S&P500 were, rounded, ATT 9%, GM 7%, Exxon (4%) IBM (4%) DuPont (3%) Texaco (3%) Sears (3%) GE 2%, Kodak 2%, Gulf 1%, for a total of 38%. This is pretty close to current concentration, but the current top 10% is basically all technology except for Eli Lily at 1.5%, so in that sense it's arguably unprecedented. There's a good chart here on page 5 of top 10 weights over time, and on 6 of how the 1965 top 10 fared to 2025. https://corporate.vanguard.com/content/dam/corp/research/pdf/partner_perspectives_unlocking_potential_spglobal_vanguard.pdf https://corporate.vanguard.com/content/dam/corp/research/pdf...