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Full article on Yahoo Finance
Ciena Set to Join S&P 500; Arrowhead Pharmaceuticals to Join S&P MidCap 400; ADT and OneSpaWorld Holdings to Join S&P SmallCap 600
Market Intelligence Analysis
AI-Powered
Why This Matters
Ciena is set to join the S&P 500, Arrowhead Pharmaceuticals will join the S&P MidCap 400, and ADT and OneSpaWorld Holdings will join the S&P SmallCap 600, marking changes to the indices.
Market Impact
Market impact analysis based on neutral sentiment with 90% confidence.
Sentiment
Neutral
AI Confidence
90%
Time Horizon
Short Term
Article Context
Note: This is a brief excerpt for context. Click below to read the full article on the original source.
S&P Dow Jones Indices will make the following changes to the S&P 500, S&P MidCap 400, S&P SmallCap 600:
Original article published by
Yahoo Finance
on February 5, 2026.
Analysis and insights provided by AnalystMarkets AI.
Analysis and insights provided by AnalystMarkets AI.