S.D. Codified Laws § 3-13-73 (2026)
The total investment return on any offered investment must be allocated to the account of each participant based on the proportion the participant's account bears to all other accounts that have been invested in the same investment alternative. Allocations must be made on each accounting date. The last day of each calendar quarter is an accounting date. The board may provide additional accounting dates.
Source: SL 2025, ch 27 , § 100.