Author

Navid Parvini

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Preprint Aug 2026

Buy the Rumor, Sell the News: When Is News Priced In?

Two old market sayings hold that news is already priced in by the time it is published, and that the rumor is bought while the news is sold. Both place the price move associated with a piece of news before and at publication rather than after it. Whether the claims hold, for which kinds of news, and by how much are bas...

Alireza Kargarzadeh, Nariman Khaledian, Navid Parvini et al. · 0 citations

#natural language process... Preprint Aug 2026

Large Language Model-Driven Small-Capitalization Trading: Integrating Financial News Sentiment, Macroeconomic Indicators, and Technical Signals

This work examines the pipeline on Russell 2000 equities under three stock-selection regimes and suggests that stock-selection regime and allocator choice matter at least as much as the sentiment model, and that separating firm-specific and macro-exposure triggers is more informative than requiring both to fire simulta...

Alireza Kargarzadeh, Nariman Khaledian, Navid Parvini et al. · 0 citations