Quant Mashup - Tommi Johnsen What Investors Should Know About Common Sentiment Models: Tone Isn’t Attribution [Tommi Johnsen]Sentiment analysis has become a foundational tool in modern investing. From academic papers to hedge fund dashboards, models like FinBERT and RoBERTa variants are routinely used to classify news as positive or negative for stocks. However, there is a critical assumption hiding in plain sight. Thanks(...)