EIA reported a build of 49 Bcf for the week ending 7/16/2021. This was larger than the median estimate of 41 Bcf. Today's stat fell outside the expected range, which was 48 Bcf on the more bearish end, and 30 Bcf on the more bullish end.
Prices were down in the five minutes following the announcement, to $3.914, from $3.931 just before 9:30am.