Calculation Formula For HSI
The current Hang Seng Index is calculated from this formula:
Descriptions on parameters:
- P(t)：Current Price at Day t
- P(t-1)：Closing Price at Day (t-1)
- IS：Issued Shares (Only H-share portion is taken into calculation in case of H-share constituents.)
- FAF：Freefloat-adjusted Factor, which is between 0 and 1, adjusted quarterly
- CF：Cap Factor, which is between 0 and 1, adjusted quarterly
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