AI Summary

In the first four months of 2026, electricity, natural gas, and coal prices indicated that coal generation remained economically attractive in the Midcontinent Independent System Operator (MISO) region. The dark spread— the difference between coal fuel costs and wholesale electricity prices— grew faster than the spark spread, which measures the revenue margin for natural gas‑fired generators. This trend suggests that coal continues to offer a competitive cost advantage for power producers in central United States markets.

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