Calculation Methodology update for 2 indices

Euronext would like to inform clients that the the calculation formula for following indices will be updated as from 18 September 2023.
 

Name	Datafeed name	Mnemo	ISINCODE	MIC	Currency	Closing Schedule
Euronext B Stellantis 140223 Decrement 1.04	EN BSTL140223D1.04	SBSTD	FRIX00001175	XPAR	EUR	EU Market close
Euronext B Credit Agricole 170223 GR Decrement 0.9	EN BACA170223 D0.9	SBCAD	FRIX00001209	XPAR	EUR	EU Market close

Current Formula :

DPI(t) = DPI(t−1) ∗ ???(?) / ???(?−1) − ?????? ∗ ??? / 365

Where:

DPI(t−1):  Decrement Return Index value on day t-1

DPI(t): Decrement Return Index value on day t

???(?−1):Decrement Underlying Index value on day t-1

???(?): Decrement Underlying Index value on day t

??????: Index points per annum relevant for the index

???: Number of calendar days between day t and day t-1

New Formula :

DPI(t) = DPI(t−1) ∗ ???(?) / ???(?−1) − ?????? ∗ ??? / 360