Saïd Achchab

Sentiment as a Brake, Not a Signal: A Profit-at-Risk and Placebo Attribution of Affective Features in Equity Trading Systems

Trading systems increasingly use the affective content of financial text to size positions, assuming that sentiment carries information a price-based model lacks. We ask whether that assumption survives a falsification test. Using more than three million social-media and news mes...

Sentiment as a Brake, Not a Signal: A Profit-at-Risk and Placebo Attribution of Affective Features in Equity Trading Systems

Trading systems increasingly use the affective content of financial text to size positions, assuming that sentiment carries information a price-based model lacks. We ask whether that assumption survives a falsification test. Using more than three million social-media and news mes...