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cs.AI2026
Thinking Fast, Trading Late: System One Decision Models vs the Market
Amir Dehkordi, Alireza Kargarzadeh, Nariman Khaledian +3
Large language models (LLMs) read company news at scale, and backtests suggest that their readings predict stock returns. We ask how much of that predictability survives a test tha…
cs.AI2026
Buy the Rumor, Sell the News: When Is News Priced In?
Alireza Kargarzadeh, Nariman Khaledian, Navid Parvini +2
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 are empirical claims about event t…