MISO employs the IMM to monitor and potentially mitigate RSG Total Production Costs. When the IMM takes action, the mitigated amounts appear on the Market Settlements statement under IMM_MWP
Reference:
IMM Mitigation - DA_RSG_MWP and RT_RSG_MWP
DA_RSG_MWP and RT_RSG_MWP may be mitigated by Resource by Operating Day (OD) when Total Production Costs exceed the Independent Market Monitor’s (IMM) pre-determined reference tolerances.
For additional information please see BPM-005 Market Settlements