August Nymex natural gas futures faltered Wednesday, snapping a furious rally that dated to last week amid robust cooling demand and global supply worries. The prompt month gas futures contract settled at $8.687/MMBtu, down 30.6 cents day/day. September fell 27.1 cents to $8.554.

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At A Glance:

  • BREAKING: U.S. EIA reported an injection of 15 Bcf natural gas into storage for the week ended July 22
  • U.S. demand strong, driving up cash prices
  • September takes over as prompt month

NGI’s Spot Gas National Avg. followed suit, dropping 60.5 cents to $8.570.

The August contract expired at the close Wednesday following volatile trading over its final two sessions at the front of the curve. Volatility is common ahead of expiry. Still, analysts said the demand drivers that had sent...