How do news sources shift their financial market sentiment over time? This index measures editorial bias across — AI-analyzed articles from 20+ international sources — something impossible to track manually at scale.
Each article from our RSS feed network is analyzed by GPT-4o, which classifies it on a continuous sentiment scale from −1.0 (strongly bearish) to +1.0 (strongly bullish). Articles are grouped by source and ISO week. We compute the mean sentiment, standard deviation, and the proportion of bullish (> 0.1), bearish (< −0.1), and neutral articles per source per week. The divergence score measures how much sources disagree on a given market context.
Citation: AIamond Research (2026). Weekly Media Sentiment Index. Available at: https://aiamond.com/research
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