Worst Stock News September 2025 - Biggest Losers Ranking
Discover the worst performing stock news for September 2025. Our ranking shows the bottom 100 news stories that generated the biggest stock losses, helping you identify which news drove the most significant negative market movements.
Each news story is ranked by the actual stock price decline following the announcement, giving you insights into which types of news create the most risk for investors. Perfect for understanding negative market sentiment and identifying patterns in stock downturns.
How We Rank the Worst Stock News
Our monthly worst stock news ranking is based on actual stock price declines following news announcements. We calculate the price change from the news publication time using market hours logic:
- News before 4 PM ET: We measure price change using the same day's closing price
- News after 4 PM ET: We measure price change using the next trading day's closing price
- Weekend news: Price change is measured from the next Monday's closing price
This methodology ensures that our rankings reflect the real negative market impact of each news story, helping you understand which types of announcements create the most risk for investors.
September 2025 Performance Statistics
Performance Distribution
