The differential between the front-month CME/NYMEX Henry Hub futures contract and the NGI daily cash price at Henry Hub has grown significantly more volatile over the past 2.5 years. As shown in the left-hand graph below, the average monthly differential in 2023 was just $0.12/MMBtu, ranging from a high of $0.33/MMBtu to a low of $0.02/MMBtu. However, that spread surged to $0.94/MMBtu in November 2024, swung down to $-0.44/MMBtu in January-February 2025, and climbed back to average $0.94/MMBtu in June 2025.

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Comments

Should the marketplace not want to view this spread as the next day  cash prices (the most liquid ultra prompt) minus full month ahead futures?