Rule G-33 generally requires that brokers, dealers, and municipal securities dealers (“dealers”) effecting transactions in municipal securities compute yields and dollar prices in accordance with the formulas prescribed.

Prior to an amendment effective February 23, 2016, Rule G-33(b)(i)(B)(2) and, by reference, (b)(ii)(B)(2), provided that, for interest-bearing municipal securities with periodic interest payments and more than six months to redemption, dealers compute the dollar price or yield using a formula that accounted for the present value of all future coupon payments and a semi-annual payment of interest. The formula in Rule G-33(b)(i)(B)(2) now provides a more precise pricing calculation when computing yields and dollar prices on securities with periodic interest payments and more than one coupon payment to redemption. Under the amended pricing formula, rather than presuming a semi-annual interest payment, the formula requires factoring in the actual interest payment frequency of the security (e.g., monthly, quarterly or annually).

The compliance date for Rule G-33, as amended, is July 18, 2016.  

Prior to July 18, 2016, a dealer will be deemed to be in compliance with Rules G-33(b)(i)(B)(2) and G-33(b)(ii)(B)(2) if calculating dollar price or yield for interest-bearing municipal securities with periodic interest payments and more than six months to redemption using the actual interest payment frequency rather than assuming a semi-annual payment. Beginning July 18, 2016, the compliance date for Rule G-33, as amended, all dealers will be required to factor in the actual interest payment frequency in calculating dollar price and yield for such securities.