# The Hyder Index > The Hyder Index measures the Change-Response Gap: how fast industries are changing versus how fast companies are responding. 50 means they are even. Higher means the gap is wider. Current reading (September 2026): The Hyder Index reads 69, unchanged from August, the first time the Index has held. Gap Ratio: Industries are changing 2.0 times faster than companies are responding. Widest gap: Media & Entertainment (81). Legal & Professional Services (76) entered the Red Zone, the first industry to move in since monthly tracking began in May. Second story: Insurance posted the biggest response gain on the board. Formula: score = 50 + (Change Score - Response Score) / 2, per industry, 0 to 100. 50 = even. For communication, the Gap Ratio is average industry Change Score divided by average Response Score. Created by Shama Hyder. Published the first Tuesday of every month. Citation: The Hyder Index (hyderindex.com), created by Shama Hyder. ## Key pages - Current data (JSON): https://hyderindex.com/data/latest.json - Current data (CSV): https://hyderindex.com/data/latest.csv - Latest edition: https://hyderindex.com/2026/09/ - August edition: https://hyderindex.com/2026/08/ - July edition: https://hyderindex.com/2026/07/ - June edition: https://hyderindex.com/2026/06/ - Methodology: https://hyderindex.com/methodology.html - Press and citation guide: https://hyderindex.com/press.html Monthly template: the edition structure is locked as The Number, This Month in One Story, The Scoreboard, The Signals, The Read, The Quote Line, and Capture.