LorrinCFA

30 / 360 day convention - is only used for LIBOR contracts.
and here it would be [1 + r * N/360].
for anything else - EAR, BEY, calculation of Forwards from Spots - which are not based on LIBOR - use the (1+r) ^(X/12) – for months of N/365 for Days.
This convention is also consistent with the “conversion of Interest Rate Puts/Calls for the EAR calculation” at that time use the 365/X in the exponent.
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