Oct

21

ATHs, from Zubin Al Genubi

October 21, 2026 |

Many all-time highs back to back, lots with only a .5% drop. Since 2010. I'm
sure longer history will change distribution.

Alex Castaldo writes:

Most longer series are a combination of Cowles and S&P 500 indexes. These indexes are available separately on FRED:

Cowles Index (1871 to 1956)

S&P 500 (1957 to present)

Often these 2 indexes are spliced together to give a longer view (I havent checked that the tradingview numbers sent to the list match the FRED sources however), and the S&P 500 can be considered an extension of Cowles maintained by S&P corporation to continue Alfred Cowles work going forward:

Alfred Cowles: The Origins of the S&P 500 Index


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