For the Fifteen-Minute Market, the previous interval denoted as ( 𝑖 −1) is not the binding interval of the previous FMM run, ( 𝑖 −1) is the first interval of the Real-Tim Unit Commitment (RTUC) time horizon, as indicated by “C1” in Exhibit 7-1 of the BPM for Market Operations. In the fifteen minute market, the second interval in the horizon is actually the financially binding interval, while the first interval is identified as a buffer.