U.S. Economic News Sentiment is Becoming More Persistent
Analysis of 45 years of newspaper data shows sentiment shocks now linger longer and resist short-term correction.
Economic news sentiment in the U.S. has shifted from a series of rapid daily reactions to a regime of persistent episodes. While the overall balance of positive and negative coverage has remained stable since 1980, the time spent in specific optimistic or pessimistic states has increased substantially.
This evolution suggests a weakening of short-run corrective feedback. Sentiment shocks now leave longer traces than traditional exponential decay models predict, resulting in lower volatility and fewer reversals. The data also reveals increasing bimodality, creating a sharper separation between positive and negative sentiment states.
https://arxiv.org/abs/2607.06220
Negative sentiment bursts tend to last longer than positive ones. These dynamics align with a model where a latent sentiment component evolves slowly, making the overall mood more resistant to change once a trend is established.
News-based sentiment is no longer a simple mirror of daily events that resets every 24 hours. It has become a structural driver of prolonged emotional regimes.