391,850 news articles vs Polymarket. Basically zero signal.
I tested a pretty simple idea:
If a prediction market gets more news coverage today, does it move more tomorrow?
Data:
- 391,850 articles
- 54 Polymarket markets
- 1,888 consecutive day pairs
- Jul 15 – Sep 30
Result:
Correlation with next-day movement: r = -0.002
So basically nothing.
Even the highest-news-volume days didn’t lead to bigger moves. Actually, the lowest-attention bucket had larger next-day moves on average.
My takeaway: more news ≠ more new information.
A lot of articles are just the same story repeated across outlets. Raw volume also ignores direction, novelty and source quality.
Full writeup + charts: Do News Move Prediction Markets? Evidence from 391,850 Arti…