open-spx

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wgeul / open-spx

Approximate bottom-up S&P 500 return replication from historical constituents, estimated weights, constituent returns, and daily contribution attribution. Independent project; not affiliated with or endorsed by S&P Dow Jones Indices. Inferred weights are not official index data.

finance sp500 sp500-data open-spx

Updated Jun 17, 2026
Python

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