Frac spreads strengthened in March 2026, averaging $4.09/MMBtu so far—up 37% from February and 10% above the $3.70/MMBtu recorded in March 2025. Propane remains the largest contributor at $1.46/MMBtu, with natural gasoline next at $1.29/MMBtu. Propane is below year-ago levels, while natural gasoline is higher, and both remain the primary drivers of the overall spread. Normal butane and isobutane provide additional support at $0.72/MMBtu and $0.42/MMBtu, respectively. The frac spread for ethane, which was slightly negative in January, has climbed steadily and now stands at $0.21/MMBtu.

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