MainStay MacKay DefinedTerm Municipal Opportunities Fund announced monthly dividend distributions of $0.06 per common share for the months of October 2023. This amount represents a decrease from the Fund's July, August and September 2023 dividend distributions, which were $0.07 per common share. Ex-Date is October 13, 2023.

Record Date is October 16, 2023. Payable Date is October 31, 2023.