Gahow Wang 140f0695d0 data: update S&P 500 membership history

2026-05-14 12:54:03 +08:00

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.gitkeep

Initial commit: quant backtesting framework with daily trading simulator

2026-04-05 00:41:19 +08:00

sp500_history.json

data: update S&P 500 membership history

2026-05-14 12:54:03 +08:00